Establishing Paternity in Indiana

When a child is born to unmarried parents in Indiana, the law does not automatically recognize the father — even if everyone knows who he is, and even if his name goes on the birth certificate. Paternity has to be legally established before a father has rights or a child can claim what flows from having two legal parents: support, inheritance, a complete medical history, and a relationship protected by court order. How paternity gets established, and the deadlines that go with it, matter more than most parents realize.

Paternity is the legal determination that a particular man is a child's father. For a married couple, the law presumes the husband is the father. For unmarried parents, that legal link does not exist until it is created — and Indiana recognizes only specific ways to create it. Getting this right affects custody, parenting time, child support, the child's right to inherit, eligibility for benefits, and access to the father's medical history.

Signing the Birth Certificate Is Not Enough

A common and costly misunderstanding: putting a father's name on the birth certificate does not, by itself, legally establish paternity in Indiana. Under Ind. Code § 31-14-2-1, there are only two ways to establish paternity for an unmarried couple — by executing a valid paternity affidavit, or through a court action. Without one of those, the man has no legally enforceable rights to the child and no enforceable obligations, regardless of what the birth record says.

The Paternity Affidavit

The most common route is the paternity affidavit under Ind. Code § 16-37-2-2.1. It is usually offered at the hospital around the time of birth, and the official form is void if signed more than 72 hours after the child's birth at the hospital (it can also be executed later through the local health department or a Title IV-D office). When properly executed, a paternity affidavit conclusively establishes the man as the child's legal father — no court proceeding required.

But signing an affidavit is a serious legal act with consequences worth understanding before signing:

• Genetic testing has a short window. A man who is a party to the affidavit may file a court action requesting a genetic test, but only within 60 days of executing the affidavit.
• Rescission is nearly impossible after 60 days. A properly executed affidavit cannot be rescinded more than 60 days after it is signed unless a court finds fraud, duress, or a material mistake of fact. This is the rule that surprises people most: a man who signs at the hospital and later learns he may not be the biological father generally cannot simply undo it.
• Custody default. When paternity is established by affidavit, the mother has sole legal and primary physical custody unless a court orders otherwise in a proceeding under Ind. Code § 31-14, or the parents specifically agree to share joint legal custody on the affidavit itself. Establishing paternity is not the same as obtaining custody or parenting time.

Because of how hard it is to undo, the affidavit deserves real thought before signing — not a reflexive signature in the delivery room.

Establishing Paternity Through Court

The second route is a paternity action filed in court under Ind. Code § 31-14. This is the path when there is a dispute, when no affidavit was signed, when genetic testing is wanted, or when a father wants the court to address custody and parenting time at the same time.

A few things to know about the court process:

• Who can file and when. Under Ind. Code § 31-14-5-3, the mother, a man alleging to be the father, or the State (through a Title IV-D / child support office) generally must file within two years of the child's birth.
• The deadline has real exceptions. The two-year limit does not end the matter in several situations — for example, if both parents waive the limit and file jointly; if the alleged father has been voluntarily furnishing support; if one parent files after the other has acknowledged paternity in writing; if the petitioner was legally incompetent when the child was born; or if the respondent could not be served within the two-year window. Notably, the two-year limit also does not apply the same way to actions filed by the State's child support agency, and the child can file a petition at a later age.
• Venue. The action is generally filed in the county where the child, the mother, or the alleged father lives (Ind. Code § 31-14-3-2).
• The Putative Father Registry. A man who files or is a party to a paternity action is generally required to register with Indiana's Putative Father Registry (Ind. Code § 31-19-5). That registry matters separately in the adoption context — a man who wants to preserve the right to notice of an adoption proceeding generally must register promptly, and failing to do so can cost him the right to object.

Genetic Testing and the Presumption of Paternity

In a court action, genetic testing is common, and Indiana law treats a strong genetic result as a presumption of fatherhood. Under Ind. Code § 31-14-7-1, a man is presumed to be the biological father if any of the following is true: the child was born during his marriage to the mother (or within 300 days after that marriage ended by death, annulment, or dissolution); the couple attempted to marry and the child was born during or within 300 days of that attempted marriage; or a genetic test shows at least a 99% probability that he is the father.

These presumptions are strong but not absolute — they can be overcome, but only by direct, clear, and convincing evidence to the contrary. That high standard is why disestablishing a presumed father's paternity is genuinely difficult, and why "I'm not sure the child is mine" is not, on its own, enough to undo an established legal relationship.

What Establishing Paternity Actually Does

Once paternity is established, Indiana law (Ind. Code § 31-14-10-1) directs the court — in the initial determination — to address support, custody, and parenting time. Establishing paternity opens the door to all of it, but it does not by itself resolve any of it; those are separate determinations the court makes. The practical effects include:

• Child support. A legal father can be ordered to pay support — and a child gains the right to that support. See our article on how Indiana child support is calculated for how the amount is determined.
• Custody and parenting time. A legal father can seek custody and a parenting-time schedule — the factors courts use are covered in our article on how Indiana courts decide child custody. Without established paternity, he generally has no standing to ask.
• The child's rights. A legal relationship gives the child rights to inherit from the father, to certain benefits (such as Social Security or veterans' benefits in appropriate cases), and to an accurate, complete family medical history.
• The father's name and role. Paternity is what makes the father-child relationship legally real and enforceable.

This is why paternity is often framed as being for the child as much as for either parent. It is the legal foundation that everything else — support, custody, inheritance — is built on.

Disestablishing Paternity Is Hard by Design

People sometimes assume that if DNA later shows a man is not the biological father, the legal relationship simply dissolves. Indiana law is far more cautious, because the child's stability is at stake. As noted above, a paternity affidavit is generally locked in after 60 days absent fraud, duress, or material mistake of fact, and a presumption of paternity yields only to direct, clear, and convincing evidence. Indiana courts have repeatedly emphasized how limited the avenues are to undo an established paternity — which is the strongest argument for getting it right before signing an affidavit or letting the two-year clock run, rather than trying to fix it later.

Paternity in Central Indiana

Hammond Legal is based in Anderson and helps parents with paternity and related family-law matters across Central Indiana, including Madison County (Anderson), Hamilton County (Noblesville), Hancock County (Greenfield), Marion County (Indianapolis), Shelby County (Shelbyville), Delaware County (Muncie), and Henry County (New Castle). While Indiana's paternity statutes apply the same way statewide, local courts can differ in their procedures for hearings, genetic testing, and scheduling.

If you have questions about establishing or contesting paternity in Indiana — or about the custody, parenting time, and support that follow — speaking with an attorney early gives you the clearest picture of your options, especially given the short affidavit and filing deadlines. Contact Hammond Legal at 317-284-9944 or info@hammond.legal.

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