How to Establish Paternity in New Jersey
Reviewed by DocDraft Legal Team · New Jersey · Last updated 2026-09-12
In New Jersey, establishing paternity means legally identifying a child's father so the child can obtain support, custody and parenting time, health coverage, inheritance, and benefits. New Jersey follows its Parentage Act (N.J.S.A. 9:17-38 and following). Unmarried parents who agree can sign a Certificate of Parentage through the state Paternity Opportunity Program, which has the same force and effect as a court order once completed. Three levers are load-bearing here. New Jersey gives one of the longest windows in the country to bring a court paternity action: no action may be brought more than five years after the child reaches the age of majority, so effectively before the child's twenty-third birthday (N.J.S.A. 9:17-45). A man is presumed the biological father when the child is born during a marriage, or within 300 days after it ends, a presumption that may be rebutted only by clear and convincing evidence (N.J.S.A. 9:17-43). And genetic testing showing a 95 percent or greater probability of paternity creates a presumption that may be rebutted only by clear and convincing evidence that the results are unreliable in that case (N.J.S.A. 9:17-48). Attorney review of your situation is available through DocDraft.
Find out where you stand in New Jersey
Where are you in establishing paternity?
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Do I have to go to court to establish paternity in New Jersey?
No, not if the parents agree. They can sign a Certificate of Parentage through the Paternity Opportunity Program, which carries the force of a court order. A court complaint is needed only when parents disagree, and the court can order genetic testing before ruling (N.J.S.A. 9:17-45, 9:17-48).
How long do I have to establish paternity in New Jersey?
New Jersey allows a long window. No action to establish paternity may be brought more than five years after the child reaches the age of majority (N.J.S.A. 9:17-45). Because majority is 18, an action can generally be filed until the child's twenty-third birthday, later than most states permit.
What is the marital presumption of paternity in New Jersey?
A man is presumed to be the biological father if the child is born during the marriage, or within 300 days after the marriage is terminated by death, annulment, or divorce (N.J.S.A. 9:17-43). The presumption may be rebutted in an appropriate action only by clear and convincing evidence.
What genetic-testing result establishes paternity in New Jersey?
Under N.J.S.A. 9:17-48, blood or genetic test results indicating a 95 percent or greater probability that the alleged father is the father create a presumption of paternity. That presumption may be rebutted only by clear and convincing evidence that the results are not reliable in that particular case.
New Jersey paternity law at a glance
New Jersey's Parentage Act (N.J.S.A. 9:17-38 and following) gives an unusually long runway. No action to establish paternity may be brought more than five years after the child reaches the age of majority, so a case can generally be filed until the child turns twenty-three (N.J.S.A. 9:17-45), beyond common age-18 or age-21 cutoffs. Unmarried parents who agree can skip court by signing a Certificate of Parentage through the state Paternity Opportunity Program, which has the force of a court order; either may rescind within the earlier of sixty days or the date a support order is set. The marital presumption reaches a child born during a marriage or within 300 days after it ends and yields only to clear and convincing evidence (N.J.S.A. 9:17-43). Genetic testing at a 95 percent or greater probability presumes paternity, rebuttable only by clear and convincing evidence that the results are unreliable (N.J.S.A. 9:17-48).
Establishing New Jersey paternity within the five-years-after-majority window
Suppose a child is born in New Jersey to unmarried parents who agree on the father. Both sign a Certificate of Parentage through the Paternity Opportunity Program at the hospital, which has the same force and effect as a court order. If one parent has second thoughts, they may rescind within the earlier of sixty days or the date a support order is established. Now suppose instead the parents never signed and a dispute surfaces when the child is nineteen. New Jersey still allows the action, because no complaint may be brought more than five years after the child reaches majority, so up to about age 23 (N.J.S.A. 9:17-45). The court can order genetic testing, where a 95 percent or greater probability presumes paternity (N.J.S.A. 9:17-48). Had the child been born during a marriage, the husband would be presumed the father under N.J.S.A. 9:17-43. Attorney review is available through DocDraft.
Relevant Laws
N.J.S.A. 9:17-45 (action to establish parentage; limitation)
Provides who may bring an action to determine the parent-child relationship and states that no action may be brought more than five years after the child attains the age of majority.
N.J.S.A. 9:17-43 (presumptions of paternity)
Provides that a man is presumed the biological father when the child is born during the marriage or within 300 days after it ends, and that the presumption may be rebutted in an appropriate action only by clear and convincing evidence.
N.J.S.A. 9:17-48 (genetic-testing threshold)
Provides that blood or genetic test results indicating a 95 percent or greater probability create a presumption of paternity, rebuttable only by clear and convincing evidence that the results are not reliable in that particular case.
New Jersey Paternity Opportunity Program (Certificate of Parentage)
The state Paternity Opportunity Program administers the Certificate of Parentage that unmarried parents sign to acknowledge paternity, which has the same force and effect as a court order, subject to the rescission window.
New Jersey Office of Vital Statistics and Registry
The Office of Vital Statistics and Registry records the Certificate of Parentage and adds an acknowledged parent to the child's birth record.
42 U.S.C. 666(a)(5) and 45 CFR 303.5 (federal rescission window)
Federal law requires every state child-support program to offer an in-hospital voluntary acknowledgment of paternity with a 60-day window to rescind, after which the acknowledgment can be challenged only for fraud, duress, or material mistake of fact.
Regional Variances
New Jersey paternity rules at a glance
Voluntary path and form
Unmarried parents establish paternity by signing a Certificate of Parentage through the Paternity Opportunity Program; once completed it has the same force and effect as a court order.
Rescission window
Either signatory may rescind within the earlier of sixty days after signing or the date a support order is established, after which challenges are limited to fraud, duress, or material mistake of fact.
Marital presumption and standard
A man is presumed the biological father when the child is born during the marriage or within 300 days after it ends (N.J.S.A. 9:17-43), rebuttable only by clear and convincing evidence.
Deadline to establish
No action may be brought more than five years after the child reaches majority, so generally before the child's twenty-third birthday (N.J.S.A. 9:17-45), one of the longest windows nationwide.
Genetic-testing threshold
Results of a 95 percent or greater probability create a presumption of paternity, rebuttable only by clear and convincing evidence that they are unreliable (N.J.S.A. 9:17-48).
Who administers it
The Paternity Opportunity Program administers the certificate and the Office of Vital Statistics and Registry records it; the court decides contested parentage and can order genetic testing.
Suggested Compliance Checklist
Confirm whether the marital presumption applies
Before signing or filing anything days after startingDetermine whether the child was born during a marriage or within 300 days after it ended, which triggers New Jersey's marital presumption (N.J.S.A. 9:17-43). That presumption can be rebutted only by clear and convincing evidence.
Get genetic testing if parentage is uncertain
Before signing a Certificate of Parentage days after startingIf there is doubt about biological parentage, obtain genetic testing first. Under N.J.S.A. 9:17-48, results of a 95 percent or greater probability create a presumption of paternity.
Sign the Certificate of Parentage
At the hospital or a local office days after startingUnmarried parents who agree sign a Certificate of Parentage through the Paternity Opportunity Program, which has the same force and effect as a court order. Keep a copy. Attorney review of your matter is available through DocDraft.
Track the rescission window
Within 60 days of signing days after startingTo cancel a signed certificate, rescind within the earlier of sixty days or the date a support order is established, after which it can be challenged only for fraud, duress, or material mistake of fact.
File a complaint to establish paternity if parents disagree
Any time before the deadline days after startingIf parents do not agree, file a complaint to establish paternity (N.J.S.A. 9:17-45). The court can order genetic testing and enter orders for support, custody, and parenting time.
Keep records and calendar the majority-plus-five-years deadline
Ongoing days after startingSave copies of the Certificate of Parentage, any genetic-test results, and court papers, and calendar the deadline: no action may be brought more than five years after the child reaches majority, so before about age 23 (N.J.S.A. 9:17-45).
| Task | Description | Document | Days after starting |
|---|---|---|---|
| Confirm whether the marital presumption applies | Determine whether the child was born during a marriage or within 300 days after it ended, which triggers New Jersey's marital presumption (N.J.S.A. 9:17-43). That presumption can be rebutted only by clear and convincing evidence. | - | Before signing or filing anything |
| Get genetic testing if parentage is uncertain | If there is doubt about biological parentage, obtain genetic testing first. Under N.J.S.A. 9:17-48, results of a 95 percent or greater probability create a presumption of paternity. | - | Before signing a Certificate of Parentage |
| Sign the Certificate of Parentage | Unmarried parents who agree sign a Certificate of Parentage through the Paternity Opportunity Program, which has the same force and effect as a court order. Keep a copy. Attorney review of your matter is available through DocDraft. | - | At the hospital or a local office |
| Track the rescission window | To cancel a signed certificate, rescind within the earlier of sixty days or the date a support order is established, after which it can be challenged only for fraud, duress, or material mistake of fact. | - | Within 60 days of signing |
| File a complaint to establish paternity if parents disagree | If parents do not agree, file a complaint to establish paternity (N.J.S.A. 9:17-45). The court can order genetic testing and enter orders for support, custody, and parenting time. | - | Any time before the deadline |
| Keep records and calendar the majority-plus-five-years deadline | Save copies of the Certificate of Parentage, any genetic-test results, and court papers, and calendar the deadline: no action may be brought more than five years after the child reaches majority, so before about age 23 (N.J.S.A. 9:17-45). | - | Ongoing |
Frequently Asked Questions
Establishing paternity in New Jersey means legally identifying a child's father so the child can receive support, custody and parenting time, health coverage, inheritance, and benefits. It is done by signing a Certificate of Parentage or through a court complaint to establish paternity under the Parentage Act (N.J.S.A. 9:17-43, 9:17-45).
Unmarried parents who agree can sign a Certificate of Parentage through the Paternity Opportunity Program, which has the same force and effect as a court order. If parents disagree, an interested party files a complaint to establish paternity and the court can order genetic testing (N.J.S.A. 9:17-45, 9:17-48).
It is the form unmarried parents sign through the Paternity Opportunity Program to acknowledge paternity without going to court. Once completed it has the same force and effect as a court order establishing the parent-child relationship, and it can be signed at the hospital or later at a vital-statistics or child support office.
Under N.J.S.A. 9:17-45, no action to establish paternity may be brought more than five years after the child reaches the age of majority. Because majority is 18, that generally allows a complaint to be filed until the child's twenty-third birthday, one of the longest windows nationwide.
A man is presumed the biological father when the child is born during the marriage or within 300 days after it ends (N.J.S.A. 9:17-43). The presumption may be rebutted in an appropriate action only by clear and convincing evidence, or by a court order establishing that another man is the child's father.
Yes, within a limited time. Either signatory may rescind within the earlier of sixty days after signing or the date a support order is established. After that, the acknowledgment can be challenged only on the grounds of fraud, duress, or a material mistake of fact.
Under N.J.S.A. 9:17-48, blood or genetic test results indicating a 95 percent or greater probability create a presumption of paternity. That presumption may be rebutted only by clear and convincing evidence that the results are not reliable in the particular case.
The Paternity Opportunity Program administers the Certificate of Parentage, and the Office of Vital Statistics and Registry records it, while the child-support program can help establish support. Contested parentage is decided by the court, which can order genetic testing (N.J.S.A. 9:17-45, 9:17-48).
Other New Jersey guides
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