Establishing Paternity by State

Updated August 2026

A child support order requires legal paternity first — for married parents, that's usually presumed automatically, but unmarried parents have to establish it separately, either by both parents signing a voluntary form or through a court-ordered genetic test. The process and where you file both vary by state.

How Paternity Gets Established, in General

Voluntary Acknowledgment

Most parents establish paternity by signing a Voluntary Acknowledgment of Paternity (VAP) — often right at the hospital when the birth is registered, or afterward through the state's vital records or child support agency. It has the same legal effect as a court order.

Court-Ordered Genetic Testing

If either parent isn't sure, or one parent won't sign, the state's child support agency or a court can order a genetic (DNA) test. Many states cover or front the cost when the agency initiates it.

Signing Waives the Right to Testing

Signing a voluntary acknowledgment generally waives the right to request genetic testing later, outside a narrow rescission window — so it isn't a decision to make on the fly if there's real uncertainty about parentage.

There's a Short Window to Rescind

Federal law requires every state to allow rescinding a signed acknowledgment — the earlier of 60 days after signing, or the date of a related court proceeding. After that, it can generally only be challenged in court for fraud, duress, or a material mistake of fact.

Paternity comes with rights, not just obligations

Establishing paternity isn't only about setting up a support order — it also gives a father legal standing to seek custody or visitation, and gives the child rights to inheritance, health insurance, and Social Security or veterans' benefits through that parent. This page is a general summary, not legal advice; confirm the current process and forms with the state's own child support or vital records office.

Paternity Rules by State

Filter states

State	Voluntary Acknowledgment	Genetic Testing	Rescission Deadline
Alabama	Signed at the hospital when the birth is registered, or afterward through the Alabama Department of Public Health, Bureau of Vital Statistics.	Either parent can request testing through the county Department of Human Resources (DHR); a contested case is resolved administratively or in court.	60 days from signing, or earlier if a related court proceeding begins first.
Alaska	Signed at the hospital at birth, or later through Alaska Health Analytics & Vital Records.	The Child Support Services Division (CSSD) can arrange testing administratively; either parent may also request it through the court.	60 days after signing — filed with Health Analytics & Vital Records — or earlier if a related legal proceeding starts first.
Arizona	Signed at the hospital through the Hospital Paternity Program (HPP), filed by the Division of Child Support Services (DCSS); also available afterward through DCSS.	DCSS arranges and initially covers the cost of testing when paternity is in question, before establishing an order.	Not clearly state-specific in official sources reviewed; the federal 60-day floor applies unless Arizona's own materials state otherwise.
Arkansas	Available at the hospital at birth, or afterward through the Arkansas DFA Office of Child Support Enforcement (OCSE).	OCSE can order testing administratively as part of establishing a case; a contested result can be taken to court.	Not clearly state-specific in official sources reviewed; the federal 60-day floor applies unless Arkansas's own materials state otherwise.
California	The Voluntary Declaration of Parentage (VDOP) is signed at the hospital, or later through the county Local Child Support Agency (LCSA) Paternity Opportunity Program.	Signing a VDOP waives the right to genetic testing; if paternity is contested before signing, either parent can request testing through the LCSA or the court.	60 days from the date the last parent signed, unless a custody, visitation, or support court order is entered first.
Colorado	An Acknowledgment of Paternity can be signed at the hospital, established administratively through the county child support office, or ordered by a court.	If either parent is uncertain, a court proceeding is generally required to compel testing — signing the AOP without it waives a later testing right.	Not clearly state-specific in official sources reviewed; the federal 60-day floor applies unless Colorado's own materials state otherwise.
Connecticut	The Acknowledgment of Parentage is signed at the hospital or later through the Department of Social Services (DSS) Child Support Unit.	DSS can facilitate genetic testing when parentage is disputed, or either parent can raise it in court.	60 days from signing, for any reason — one of the more explicit "for any reason" rescission rights among the states reviewed.
Delaware	Signed at the hospital, or afterward through the Division of Child Support Services (DCSS), Delaware Health and Social Services.	DCSS helps coordinate genetic testing when either parent is unsure about paternity.	Not clearly state-specific in official sources reviewed; the federal 60-day floor applies unless Delaware's own materials state otherwise.
District of Columbia	Signed at the hospital, or later through the Child Support Services Division (CSSD) of the Office of the Attorney General.	CSSD can arrange administrative genetic testing; a contested case can also go before D.C. Superior Court.	The earlier of 60 days after signing or the date of a related court/administrative proceeding.
Florida	Signed at the hospital, or afterward through the Florida Department of Revenue Child Support Program.	Either parent can request testing through the Child Support Program; a parent who fails to comply with a court-ordered test faces legal consequences.	60 days after signing, or before any related court proceeding begins, whichever comes first.
Georgia	The Paternity Acknowledgment is signed at the hospital or later through DHS Division of Child Support Services (DCSS), via its PAMMS system.	DNA testing is required by law on newly established cases unless it was already offered and waived in writing when the acknowledgment was signed.	60 days from the signing parent's own signature date.
Hawaii	Signed at the hospital, or afterward through the Attorney General's Child Support Enforcement Agency (CSEA) or the Department of Health.	Either parent can pursue DNA testing (typically $300–$500 unless the agency covers it); CSEA can also order it administratively.	Not clearly state-specific in official sources reviewed; the federal 60-day floor applies unless Hawaii's own materials state otherwise.
Idaho	Signed at the hospital, or later through Idaho Child Support Services / the Bureau of Vital Records.	Idaho Child Support Services can request testing; a court can also enter a support order directly once a voluntary acknowledgment is on file.	Not clearly state-specific in official sources reviewed; the federal 60-day floor applies unless Idaho's own materials state otherwise.
Illinois	Signed at the hospital, or afterward through Healthcare and Family Services (HFS) Division of Child Support Services.	A genetic test allows HFS or the court to establish paternity when it's in question; signing the VAP waives that right.	60 days from the effective date of the VAP or Denial of Parentage, filed with HFS (Form HFS 3416E).
Indiana	The paternity affidavit is signed at the hospital, or later through the Department of Child Services (DCS).	A parent can request genetic testing through the court, or agree to paternity without it at a hearing.	60 days after signing, if a court action is filed and genetic testing is requested within that window.
Iowa	Signed at the hospital, or afterward through Iowa HHS Child Support Services.	Iowa Child Support can perform genetic testing when paternity hasn't yet been legally established.	Filed as a cancellation/rescission affidavit through Iowa HHS; the exact day count isn't clearly stated in official materials reviewed, so the federal 60-day floor is the best available guide.
Kansas	Signed at the hospital, or later through the Department for Children and Families (DCF) Child Support Services.	Either parent can request testing when filing to establish parentage through DCF or the court.	Revocation must meet the requirements of K.S.A. 23-2209; the exact day count isn't clearly stated in official materials reviewed, so the federal 60-day floor is the best available guide.
Kentucky	The Voluntary Acknowledgment of Paternity form is signed at the hospital and filed with the Office of Vital Statistics, Cabinet for Health and Family Services.	If the mother seeks support, the Cabinet for Health and Family Services can order mandatory genetic testing at no cost to the parents.	Not clearly state-specific in official sources reviewed; the federal 60-day floor applies unless Kentucky's own materials state otherwise.
Louisiana	Signed at the hospital, or afterward through the Louisiana Department of Health, Vital Records.	Either parent has the right to DNA testing and a trial on paternity before signing; the Department of Children and Family Services (DCFS) enforces support once paternity is set.	60 days from signing, without needing to give a reason.
Maine	The Acknowledgment of Paternity (AOP) is signed at the hospital, or afterward through the Department of Health and Human Services (DHHS), Office for Family Independence.	DHHS can request genetic testing; if results support paternity, the parent is asked to acknowledge parentage within 15 days of the results.	Handled through a formal court proceeding to rescind or challenge the acknowledgment; the exact day count isn't clearly stated in official materials reviewed, so the federal 60-day floor is the best available guide.
Maryland	The Affidavit of Parentage is signed at the hospital, or afterward through the Maryland Department of Health.	Either the custodial parent or the alleged father can request genetic testing through the Child Support Administration if paternity hasn't been established.	A Rescission Form is obtained from the Maryland Department of Health; the exact day count isn't clearly stated in official materials reviewed, so the federal 60-day floor is the best available guide.
Massachusetts	The Acknowledgment of Parentage is signed at the hospital, or afterward through the Department of Revenue (DOR) Child Support Enforcement.	A genetic marker test can be used to challenge an acknowledgment; DOR or the court can otherwise order testing in a contested case.	60 days after both parents sign, during which either can ask the court to rescind it.
Michigan	The Affidavit of Parentage is signed at the hospital, notarized, and filed with the Michigan Department of Health and Human Services (MDHHS).	MDHHS Office of Child Support can facilitate testing when parentage is uncertain; a contested affidavit can be challenged through a Complaint/Motion to Revoke.	Federal law requires Michigan to provide a rescission right; MDHHS policy points to the standard 60-day/related-proceeding floor rather than a longer state-specific window.
Minnesota	The Recognition of Parentage (ROP) is signed at the hospital, or afterward through the Department of Children, Youth, and Families (DCYF).	DCYF and county child support offices can arrange testing when parentage is disputed.	60 days from signing, by filing a revocation with DCYF.
Mississippi	Signed at the hospital, or afterward through the Mississippi Department of Human Services, Bureau of Vital Statistics.	A father who doubts paternity can request DNA testing through the court before a support order is entered.	Not clearly state-specific in official sources reviewed; the federal 60-day floor applies unless Mississippi's own materials state otherwise.
Missouri	The Affidavit Acknowledging Paternity is signed by both parents, typically at the hospital, or afterward through the Family Support Division (FSD).	FSD offers free genetic testing to help establish paternity when it's in question.	Not clearly state-specific in official sources reviewed; the federal 60-day floor applies unless Missouri's own materials state otherwise.
Montana	Signed at the hospital, or afterward through the Child Support Services Division (CSSD) or Vital Records.	Genetic testing can serve as the basis for a presumption of paternity, ordered administratively by CSSD or through the court.	Not clearly state-specific in official sources reviewed; the federal 60-day floor applies unless Montana's own materials state otherwise.
Nebraska	Nebraska hospitals provide the Acknowledgement of Paternity form at birth; it's filed with the Department of Health and Human Services (DHHS).	DHHS Child Support can facilitate testing when paternity is contested.	The earlier of 60 days after the signed, notarized acknowledgment, or the date of a related proceeding.
Nevada	Signed at the hospital, or afterward through the Division of Welfare and Supportive Services (DWSS).	If the alleged father won't acknowledge paternity, the mother or DWSS can pursue testing and a paternity finding under NRS Chapter 126.	Not clearly state-specific in official sources reviewed; the federal 60-day floor applies unless Nevada's own materials state otherwise.
New Hampshire	Signed at the hospital, or afterward through DHHS Child Support Services.	DHHS notifies an alleged father and asks him to participate in genetic testing or consent to parentage.	Not clearly state-specific in official sources reviewed; the federal 60-day floor applies unless New Hampshire's own materials state otherwise.
New Jersey	Known as the Certificate of Parentage (COP), signed at the hospital or afterward through the Probation Child Support Enforcement Unit or Vital Statistics.	A parent who disputes parentage can request a paternity hearing where genetic testing is ordered.	60 days from signing, or the date a support order is established, whichever is earlier.
New Mexico	Signed at the hospital, or afterward through the Human Services Department (HSD) Child Support Enforcement Division or Vital Records.	The Title IV-D agency can order genetic testing and charges the father for its cost when there's no presumed or acknowledged father.	Handled as a formal proceeding to rescind the acknowledgment; the exact day count isn't clearly stated in official materials reviewed, so the federal 60-day floor is the best available guide.
New York	The Acknowledgment of Paternity is signed at the hospital or local registrar, or afterward through the local Department of Social Services Child Support office.	Signing the form is voluntary; without it, the court will order genetic marker or DNA testing to determine parentage.	A petition to rescind must be filed within 60 days of the date it was signed.
North Carolina	Signed at the hospital, or afterward through NC Child Support Services (NCDHHS).	NC Child Support Services can facilitate genetic testing as part of establishing a case, or a court can order it.	Not clearly state-specific in official sources reviewed; the federal 60-day floor applies unless North Carolina's own materials state otherwise.
North Dakota	Signed at the hospital, or afterward through HHS Child Support.	HHS Child Support or the district court can order testing when parentage is disputed.	60 days after filing the Acknowledgment of Paternity, by commencing a district court civil action.
Ohio	The Acknowledgment of Paternity Affidavit is available at the hospital at birth, or afterward through the local Child Support Enforcement Agency (CSEA).	Testing may be conducted when there's no final paternity determination or genuine uncertainty about parentage, through the CSEA or court.	No later than 60 days after the date of the latest signature.
Oklahoma	Signed at the hospital, or afterward through Oklahoma DHS Child Support Services.	DHS Child Support Services can order testing as part of establishing a case, or it can be raised in a UPA court action.	Generally the standard 60-day federal floor; a minor parent additionally has 60 days after turning 18 to rescind.
Oregon	The Voluntary Acknowledgment of Parentage Affidavit is signed at the hospital, or afterward through the Oregon DOJ Child Support Program.	The DOJ Child Support Program can facilitate testing when both parents don't already agree they are the genetic parents.	Requested by contacting the Oregon Health Authority Center for Health Statistics for a "Rescind of Voluntary Acknowledgment" form; the exact day count isn't clearly stated in official materials reviewed, so the federal 60-day floor is the best available guide.
Pennsylvania	Signed at the hospital, or afterward through the county Vital Records Office.	Either parent can request testing, with the cost paid by the parent who requests it.	Handled through the county Vital Records Office; the exact day count isn't clearly stated in official materials reviewed, so the federal 60-day floor is the best available guide.
Rhode Island	Signed at the hospital, or afterward through the Office of Child Support Services (OCSS).	OCSS can administratively order DNA testing upon a denial of parentage — no court order is required.	The earlier of 60 days after signing or the date of a related court challenge.
South Carolina	Signed at the hospital, or afterward through the Department of Social Services (DSS) Child Support.	DSS provides free DNA testing to establish paternity and can help pursue a court order of paternity.	Only 60 days to rescind the affidavit.
South Dakota	Signed at the hospital, or afterward through the Division of Child Support (DCS).	A parent can apply for DCS services to pursue testing and establish a support order; DCS does not provide it for free.	Not clearly state-specific in official sources reviewed; the federal 60-day floor applies unless South Dakota's own materials state otherwise.
Tennessee	Established through the Tennessee Voluntary Acknowledgment of Paternity Program (TN-VAOP), typically at the hospital.	A parent can arrange DNA testing through a private lab or the local child support office to confirm parentage.	Follows the federal 60-day floor; a longer window has been claimed by non-official sources but isn't confirmed against Tennessee's own statute, so treat 60 days as the reliable figure.
Texas	The Acknowledgment of Paternity (AOP) is signed at the hospital, or afterward through the OAG Child Support Division.	The OAG Child Support Division helps arrange a DNA test when the alleged father doesn't believe he's the biological parent.	Within the first 60 days, by filing a Rescission of Acknowledgment of Paternity (Form VS-158) with Texas Vital Statistics.
Utah	Signed at the hospital, or afterward through the Office of Recovery Services (ORS).	A court order for testing isn't required if both parties agree to it voluntarily.	Governed by the Utah Uniform Parentage Act; the exact day count isn't clearly stated in official materials reviewed, so the federal 60-day floor is the best available guide.
Vermont	Signed at the hospital, or afterward through the Department for Children and Families (DCF) Office of Child Support (OCS).	OCS pays for genetic testing in qualifying cases when parentage is contested.	Not clearly state-specific in official sources reviewed; the federal 60-day floor applies unless Vermont's own materials state otherwise.
Virginia	Signed at the hospital, or afterward through the Division of Child Support Enforcement (DCSE).	DCSE can help establish paternity, including scheduling DNA testing when needed.	60 days of signing, unless a related court order has already been entered.
Washington	Signed at the hospital, or afterward through the Division of Child Support (DCS), Department of Social and Health Services.	DCS or the court can facilitate testing when parentage isn't already acknowledged.	No more than 60 days after signing, by filing a Rescission of Parentage form with the Department of Health.
West Virginia	The Declaration of Paternity Affidavit is signed at the hospital, or afterward through the Bureau for Child Support Enforcement (BCSE).	BCSE arranges testing in a contested case; a party can also raise it through the court.	Filed as a verified petition with the circuit clerk of the county where the child resides; the exact day count isn't clearly stated in official materials reviewed, so the federal 60-day floor is the best available guide.
Wisconsin	The Voluntary Paternity Acknowledgment (VPA) is signed and notarized at the hospital, or afterward through the Department of Children and Families (DCF).	DCF pays for genetic testing until paternity is established; a 2019 law also allows an administrative testing process outside court.	Can be withdrawn if no court has yet ruled on a related family matter; otherwise the standard 60-day federal floor applies.
Wyoming	Signed at the hospital, or afterward through the Wyoming Child Support Program.	The Wyoming Child Support Program facilitates testing; results are admissible without testimony unless objected to.	Not more than 60 days after the paternity action, by filing a separate rescission action.

Alabama

Voluntary Acknowledgment: Signed at the hospital when the birth is registered, or afterward through the Alabama Department of Public Health, Bureau of Vital Statistics.
Genetic Testing: Either parent can request testing through the county Department of Human Resources (DHR); a contested case is resolved administratively or in court.
Rescission Deadline: 60 days from signing, or earlier if a related court proceeding begins first.

Alaska

Voluntary Acknowledgment: Signed at the hospital at birth, or later through Alaska Health Analytics & Vital Records.
Genetic Testing: The Child Support Services Division (CSSD) can arrange testing administratively; either parent may also request it through the court.
Rescission Deadline: 60 days after signing — filed with Health Analytics & Vital Records — or earlier if a related legal proceeding starts first.

Arizona

Voluntary Acknowledgment: Signed at the hospital through the Hospital Paternity Program (HPP), filed by the Division of Child Support Services (DCSS); also available afterward through DCSS.
Genetic Testing: DCSS arranges and initially covers the cost of testing when paternity is in question, before establishing an order.
Rescission Deadline: Not clearly state-specific in official sources reviewed; the federal 60-day floor applies unless Arizona's own materials state otherwise.

Arkansas

Voluntary Acknowledgment: Available at the hospital at birth, or afterward through the Arkansas DFA Office of Child Support Enforcement (OCSE).
Genetic Testing: OCSE can order testing administratively as part of establishing a case; a contested result can be taken to court.
Rescission Deadline: Not clearly state-specific in official sources reviewed; the federal 60-day floor applies unless Arkansas's own materials state otherwise.

California

Voluntary Acknowledgment: The Voluntary Declaration of Parentage (VDOP) is signed at the hospital, or later through the county Local Child Support Agency (LCSA) Paternity Opportunity Program.
Genetic Testing: Signing a VDOP waives the right to genetic testing; if paternity is contested before signing, either parent can request testing through the LCSA or the court.
Rescission Deadline: 60 days from the date the last parent signed, unless a custody, visitation, or support court order is entered first.

Colorado

Voluntary Acknowledgment: An Acknowledgment of Paternity can be signed at the hospital, established administratively through the county child support office, or ordered by a court.
Genetic Testing: If either parent is uncertain, a court proceeding is generally required to compel testing — signing the AOP without it waives a later testing right.
Rescission Deadline: Not clearly state-specific in official sources reviewed; the federal 60-day floor applies unless Colorado's own materials state otherwise.

Connecticut

Voluntary Acknowledgment: The Acknowledgment of Parentage is signed at the hospital or later through the Department of Social Services (DSS) Child Support Unit.
Genetic Testing: DSS can facilitate genetic testing when parentage is disputed, or either parent can raise it in court.
Rescission Deadline: 60 days from signing, for any reason — one of the more explicit "for any reason" rescission rights among the states reviewed.

Delaware

Voluntary Acknowledgment: Signed at the hospital, or afterward through the Division of Child Support Services (DCSS), Delaware Health and Social Services.
Genetic Testing: DCSS helps coordinate genetic testing when either parent is unsure about paternity.
Rescission Deadline: Not clearly state-specific in official sources reviewed; the federal 60-day floor applies unless Delaware's own materials state otherwise.

District of Columbia

Voluntary Acknowledgment: Signed at the hospital, or later through the Child Support Services Division (CSSD) of the Office of the Attorney General.
Genetic Testing: CSSD can arrange administrative genetic testing; a contested case can also go before D.C. Superior Court.
Rescission Deadline: The earlier of 60 days after signing or the date of a related court/administrative proceeding.

Florida

Voluntary Acknowledgment: Signed at the hospital, or afterward through the Florida Department of Revenue Child Support Program.
Genetic Testing: Either parent can request testing through the Child Support Program; a parent who fails to comply with a court-ordered test faces legal consequences.
Rescission Deadline: 60 days after signing, or before any related court proceeding begins, whichever comes first.

Georgia

Voluntary Acknowledgment: The Paternity Acknowledgment is signed at the hospital or later through DHS Division of Child Support Services (DCSS), via its PAMMS system.
Genetic Testing: DNA testing is required by law on newly established cases unless it was already offered and waived in writing when the acknowledgment was signed.
Rescission Deadline: 60 days from the signing parent's own signature date.

Hawaii

Voluntary Acknowledgment: Signed at the hospital, or afterward through the Attorney General's Child Support Enforcement Agency (CSEA) or the Department of Health.
Genetic Testing: Either parent can pursue DNA testing (typically $300–$500 unless the agency covers it); CSEA can also order it administratively.
Rescission Deadline: Not clearly state-specific in official sources reviewed; the federal 60-day floor applies unless Hawaii's own materials state otherwise.

Idaho

Voluntary Acknowledgment: Signed at the hospital, or later through Idaho Child Support Services / the Bureau of Vital Records.
Genetic Testing: Idaho Child Support Services can request testing; a court can also enter a support order directly once a voluntary acknowledgment is on file.
Rescission Deadline: Not clearly state-specific in official sources reviewed; the federal 60-day floor applies unless Idaho's own materials state otherwise.

Illinois

Voluntary Acknowledgment: Signed at the hospital, or afterward through Healthcare and Family Services (HFS) Division of Child Support Services.
Genetic Testing: A genetic test allows HFS or the court to establish paternity when it's in question; signing the VAP waives that right.
Rescission Deadline: 60 days from the effective date of the VAP or Denial of Parentage, filed with HFS (Form HFS 3416E).

Indiana

Voluntary Acknowledgment: The paternity affidavit is signed at the hospital, or later through the Department of Child Services (DCS).
Genetic Testing: A parent can request genetic testing through the court, or agree to paternity without it at a hearing.
Rescission Deadline: 60 days after signing, if a court action is filed and genetic testing is requested within that window.

Iowa

Voluntary Acknowledgment: Signed at the hospital, or afterward through Iowa HHS Child Support Services.
Genetic Testing: Iowa Child Support can perform genetic testing when paternity hasn't yet been legally established.
Rescission Deadline: Filed as a cancellation/rescission affidavit through Iowa HHS; the exact day count isn't clearly stated in official materials reviewed, so the federal 60-day floor is the best available guide.

Kansas

Voluntary Acknowledgment: Signed at the hospital, or later through the Department for Children and Families (DCF) Child Support Services.
Genetic Testing: Either parent can request testing when filing to establish parentage through DCF or the court.
Rescission Deadline: Revocation must meet the requirements of K.S.A. 23-2209; the exact day count isn't clearly stated in official materials reviewed, so the federal 60-day floor is the best available guide.

Kentucky

Voluntary Acknowledgment: The Voluntary Acknowledgment of Paternity form is signed at the hospital and filed with the Office of Vital Statistics, Cabinet for Health and Family Services.
Genetic Testing: If the mother seeks support, the Cabinet for Health and Family Services can order mandatory genetic testing at no cost to the parents.
Rescission Deadline: Not clearly state-specific in official sources reviewed; the federal 60-day floor applies unless Kentucky's own materials state otherwise.

Louisiana

Voluntary Acknowledgment: Signed at the hospital, or afterward through the Louisiana Department of Health, Vital Records.
Genetic Testing: Either parent has the right to DNA testing and a trial on paternity before signing; the Department of Children and Family Services (DCFS) enforces support once paternity is set.
Rescission Deadline: 60 days from signing, without needing to give a reason.

Maine

Voluntary Acknowledgment: The Acknowledgment of Paternity (AOP) is signed at the hospital, or afterward through the Department of Health and Human Services (DHHS), Office for Family Independence.
Genetic Testing: DHHS can request genetic testing; if results support paternity, the parent is asked to acknowledge parentage within 15 days of the results.
Rescission Deadline: Handled through a formal court proceeding to rescind or challenge the acknowledgment; the exact day count isn't clearly stated in official materials reviewed, so the federal 60-day floor is the best available guide.

Maryland

Voluntary Acknowledgment: The Affidavit of Parentage is signed at the hospital, or afterward through the Maryland Department of Health.
Genetic Testing: Either the custodial parent or the alleged father can request genetic testing through the Child Support Administration if paternity hasn't been established.
Rescission Deadline: A Rescission Form is obtained from the Maryland Department of Health; the exact day count isn't clearly stated in official materials reviewed, so the federal 60-day floor is the best available guide.

Massachusetts

Voluntary Acknowledgment: The Acknowledgment of Parentage is signed at the hospital, or afterward through the Department of Revenue (DOR) Child Support Enforcement.
Genetic Testing: A genetic marker test can be used to challenge an acknowledgment; DOR or the court can otherwise order testing in a contested case.
Rescission Deadline: 60 days after both parents sign, during which either can ask the court to rescind it.

Michigan

Voluntary Acknowledgment: The Affidavit of Parentage is signed at the hospital, notarized, and filed with the Michigan Department of Health and Human Services (MDHHS).
Genetic Testing: MDHHS Office of Child Support can facilitate testing when parentage is uncertain; a contested affidavit can be challenged through a Complaint/Motion to Revoke.
Rescission Deadline: Federal law requires Michigan to provide a rescission right; MDHHS policy points to the standard 60-day/related-proceeding floor rather than a longer state-specific window.

Minnesota

Voluntary Acknowledgment: The Recognition of Parentage (ROP) is signed at the hospital, or afterward through the Department of Children, Youth, and Families (DCYF).
Genetic Testing: DCYF and county child support offices can arrange testing when parentage is disputed.
Rescission Deadline: 60 days from signing, by filing a revocation with DCYF.

Mississippi

Voluntary Acknowledgment: Signed at the hospital, or afterward through the Mississippi Department of Human Services, Bureau of Vital Statistics.
Genetic Testing: A father who doubts paternity can request DNA testing through the court before a support order is entered.
Rescission Deadline: Not clearly state-specific in official sources reviewed; the federal 60-day floor applies unless Mississippi's own materials state otherwise.

Missouri

Voluntary Acknowledgment: The Affidavit Acknowledging Paternity is signed by both parents, typically at the hospital, or afterward through the Family Support Division (FSD).
Genetic Testing: FSD offers free genetic testing to help establish paternity when it's in question.
Rescission Deadline: Not clearly state-specific in official sources reviewed; the federal 60-day floor applies unless Missouri's own materials state otherwise.

Montana

Voluntary Acknowledgment: Signed at the hospital, or afterward through the Child Support Services Division (CSSD) or Vital Records.
Genetic Testing: Genetic testing can serve as the basis for a presumption of paternity, ordered administratively by CSSD or through the court.
Rescission Deadline: Not clearly state-specific in official sources reviewed; the federal 60-day floor applies unless Montana's own materials state otherwise.

Nebraska

Voluntary Acknowledgment: Nebraska hospitals provide the Acknowledgement of Paternity form at birth; it's filed with the Department of Health and Human Services (DHHS).
Genetic Testing: DHHS Child Support can facilitate testing when paternity is contested.
Rescission Deadline: The earlier of 60 days after the signed, notarized acknowledgment, or the date of a related proceeding.

Nevada

Voluntary Acknowledgment: Signed at the hospital, or afterward through the Division of Welfare and Supportive Services (DWSS).
Genetic Testing: If the alleged father won't acknowledge paternity, the mother or DWSS can pursue testing and a paternity finding under NRS Chapter 126.
Rescission Deadline: Not clearly state-specific in official sources reviewed; the federal 60-day floor applies unless Nevada's own materials state otherwise.

New Hampshire

Voluntary Acknowledgment: Signed at the hospital, or afterward through DHHS Child Support Services.
Genetic Testing: DHHS notifies an alleged father and asks him to participate in genetic testing or consent to parentage.
Rescission Deadline: Not clearly state-specific in official sources reviewed; the federal 60-day floor applies unless New Hampshire's own materials state otherwise.

New Jersey

Voluntary Acknowledgment: Known as the Certificate of Parentage (COP), signed at the hospital or afterward through the Probation Child Support Enforcement Unit or Vital Statistics.
Genetic Testing: A parent who disputes parentage can request a paternity hearing where genetic testing is ordered.
Rescission Deadline: 60 days from signing, or the date a support order is established, whichever is earlier.

New Mexico

Voluntary Acknowledgment: Signed at the hospital, or afterward through the Human Services Department (HSD) Child Support Enforcement Division or Vital Records.
Genetic Testing: The Title IV-D agency can order genetic testing and charges the father for its cost when there's no presumed or acknowledged father.
Rescission Deadline: Handled as a formal proceeding to rescind the acknowledgment; the exact day count isn't clearly stated in official materials reviewed, so the federal 60-day floor is the best available guide.

New York

Voluntary Acknowledgment: The Acknowledgment of Paternity is signed at the hospital or local registrar, or afterward through the local Department of Social Services Child Support office.
Genetic Testing: Signing the form is voluntary; without it, the court will order genetic marker or DNA testing to determine parentage.
Rescission Deadline: A petition to rescind must be filed within 60 days of the date it was signed.

North Carolina

Voluntary Acknowledgment: Signed at the hospital, or afterward through NC Child Support Services (NCDHHS).
Genetic Testing: NC Child Support Services can facilitate genetic testing as part of establishing a case, or a court can order it.
Rescission Deadline: Not clearly state-specific in official sources reviewed; the federal 60-day floor applies unless North Carolina's own materials state otherwise.

North Dakota

Voluntary Acknowledgment: Signed at the hospital, or afterward through HHS Child Support.
Genetic Testing: HHS Child Support or the district court can order testing when parentage is disputed.
Rescission Deadline: 60 days after filing the Acknowledgment of Paternity, by commencing a district court civil action.

Ohio

Voluntary Acknowledgment: The Acknowledgment of Paternity Affidavit is available at the hospital at birth, or afterward through the local Child Support Enforcement Agency (CSEA).
Genetic Testing: Testing may be conducted when there's no final paternity determination or genuine uncertainty about parentage, through the CSEA or court.
Rescission Deadline: No later than 60 days after the date of the latest signature.

Oklahoma

Voluntary Acknowledgment: Signed at the hospital, or afterward through Oklahoma DHS Child Support Services.
Genetic Testing: DHS Child Support Services can order testing as part of establishing a case, or it can be raised in a UPA court action.
Rescission Deadline: Generally the standard 60-day federal floor; a minor parent additionally has 60 days after turning 18 to rescind.

Oregon

Voluntary Acknowledgment: The Voluntary Acknowledgment of Parentage Affidavit is signed at the hospital, or afterward through the Oregon DOJ Child Support Program.
Genetic Testing: The DOJ Child Support Program can facilitate testing when both parents don't already agree they are the genetic parents.
Rescission Deadline: Requested by contacting the Oregon Health Authority Center for Health Statistics for a "Rescind of Voluntary Acknowledgment" form; the exact day count isn't clearly stated in official materials reviewed, so the federal 60-day floor is the best available guide.

Pennsylvania

Voluntary Acknowledgment: Signed at the hospital, or afterward through the county Vital Records Office.
Genetic Testing: Either parent can request testing, with the cost paid by the parent who requests it.
Rescission Deadline: Handled through the county Vital Records Office; the exact day count isn't clearly stated in official materials reviewed, so the federal 60-day floor is the best available guide.

Rhode Island

Voluntary Acknowledgment: Signed at the hospital, or afterward through the Office of Child Support Services (OCSS).
Genetic Testing: OCSS can administratively order DNA testing upon a denial of parentage — no court order is required.
Rescission Deadline: The earlier of 60 days after signing or the date of a related court challenge.

South Carolina

Voluntary Acknowledgment: Signed at the hospital, or afterward through the Department of Social Services (DSS) Child Support.
Genetic Testing: DSS provides free DNA testing to establish paternity and can help pursue a court order of paternity.
Rescission Deadline: Only 60 days to rescind the affidavit.

South Dakota

Voluntary Acknowledgment: Signed at the hospital, or afterward through the Division of Child Support (DCS).
Genetic Testing: A parent can apply for DCS services to pursue testing and establish a support order; DCS does not provide it for free.
Rescission Deadline: Not clearly state-specific in official sources reviewed; the federal 60-day floor applies unless South Dakota's own materials state otherwise.

Tennessee

Voluntary Acknowledgment: Established through the Tennessee Voluntary Acknowledgment of Paternity Program (TN-VAOP), typically at the hospital.
Genetic Testing: A parent can arrange DNA testing through a private lab or the local child support office to confirm parentage.
Rescission Deadline: Follows the federal 60-day floor; a longer window has been claimed by non-official sources but isn't confirmed against Tennessee's own statute, so treat 60 days as the reliable figure.

Texas

Voluntary Acknowledgment: The Acknowledgment of Paternity (AOP) is signed at the hospital, or afterward through the OAG Child Support Division.
Genetic Testing: The OAG Child Support Division helps arrange a DNA test when the alleged father doesn't believe he's the biological parent.
Rescission Deadline: Within the first 60 days, by filing a Rescission of Acknowledgment of Paternity (Form VS-158) with Texas Vital Statistics.

Utah

Voluntary Acknowledgment: Signed at the hospital, or afterward through the Office of Recovery Services (ORS).
Genetic Testing: A court order for testing isn't required if both parties agree to it voluntarily.
Rescission Deadline: Governed by the Utah Uniform Parentage Act; the exact day count isn't clearly stated in official materials reviewed, so the federal 60-day floor is the best available guide.

Vermont

Voluntary Acknowledgment: Signed at the hospital, or afterward through the Department for Children and Families (DCF) Office of Child Support (OCS).
Genetic Testing: OCS pays for genetic testing in qualifying cases when parentage is contested.
Rescission Deadline: Not clearly state-specific in official sources reviewed; the federal 60-day floor applies unless Vermont's own materials state otherwise.

Virginia

Voluntary Acknowledgment: Signed at the hospital, or afterward through the Division of Child Support Enforcement (DCSE).
Genetic Testing: DCSE can help establish paternity, including scheduling DNA testing when needed.
Rescission Deadline: 60 days of signing, unless a related court order has already been entered.

Washington

Voluntary Acknowledgment: Signed at the hospital, or afterward through the Division of Child Support (DCS), Department of Social and Health Services.
Genetic Testing: DCS or the court can facilitate testing when parentage isn't already acknowledged.
Rescission Deadline: No more than 60 days after signing, by filing a Rescission of Parentage form with the Department of Health.

West Virginia

Voluntary Acknowledgment: The Declaration of Paternity Affidavit is signed at the hospital, or afterward through the Bureau for Child Support Enforcement (BCSE).
Genetic Testing: BCSE arranges testing in a contested case; a party can also raise it through the court.
Rescission Deadline: Filed as a verified petition with the circuit clerk of the county where the child resides; the exact day count isn't clearly stated in official materials reviewed, so the federal 60-day floor is the best available guide.

Wisconsin

Voluntary Acknowledgment: The Voluntary Paternity Acknowledgment (VPA) is signed and notarized at the hospital, or afterward through the Department of Children and Families (DCF).
Genetic Testing: DCF pays for genetic testing until paternity is established; a 2019 law also allows an administrative testing process outside court.
Rescission Deadline: Can be withdrawn if no court has yet ruled on a related family matter; otherwise the standard 60-day federal floor applies.

Wyoming

Voluntary Acknowledgment: Signed at the hospital, or afterward through the Wyoming Child Support Program.
Genetic Testing: The Wyoming Child Support Program facilitates testing; results are admissible without testimony unless objected to.
Rescission Deadline: Not more than 60 days after the paternity action, by filing a separate rescission action.

Establishing Paternity by State

How Paternity Gets Established, in General

Voluntary Acknowledgment

Court-Ordered Genetic Testing

Signing Waives the Right to Testing

There's a Short Window to Rescind

Paternity comes with rights, not just obligations

Paternity Rules by State

Helpful Guides

Calculator & Guidelines

Modify an Order

Interstate Cases