To file a petition to establish paternity, you submit a standardized court form (with a supporting affidavit and any required documents) to the family or domestic relations court in the county where the child lives, pay the filing fee or request a waiver, and then arrange for the other parent or alleged father to be formally served with the papers. From there the case moves through DNA testing, a possible hearing, and a court order that legally recognizes the father-child relationship.
Before starting down that road, know that a court petition is only one of two paths. Federal law requires every state to offer voluntary acknowledgment of paternity, typically through a hospital-based program where both unmarried parents sign a form at the time of birth and the father’s name goes on the birth certificate. A signed acknowledgment carries the same legal weight as a court order, and either parent can rescind it within 60 days; after that, it can only be undone by proving fraud, duress, or a material mistake of fact.1Office of the Law Revision Counsel. 42 U.S.C. 666 – Requirement of Statutorily Prescribed Procedures to Improve Effectiveness of Child Support Enforcement A court petition is the right tool when the parents disagree, when the alleged father will not acknowledge the child, when the mother is married to someone else, or when a state agency needs to establish paternity so it can pursue support.
Who Can File
Standing varies by state, but the parties who commonly file are the child’s mother, the alleged father, a guardian or representative acting for the child, and state or county child support enforcement agencies. Agencies often initiate cases on their own when a custodial parent applies for public assistance, because federal law ties benefit eligibility to cooperation with paternity establishment.
Federal law also requires every state to allow a paternity action any time before the child turns 18.1Office of the Law Revision Counsel. 42 U.S.C. 666 – Requirement of Statutorily Prescribed Procedures to Improve Effectiveness of Child Support Enforcement More than a dozen states go further, with deadlines running from age 19 to age 23 and several states imposing no time limit at all when no legal father has been established.2Administration for Children and Families. Essentials for Attorneys in Child Enforcement – Chapter Eight Waiting has practical costs even when the law allows it: witnesses fade, potential DNA sources can disappear, and the child loses years of support and benefits.
Where To File
Paternity petitions belong in family court, domestic relations court, or whatever your state calls the division that handles parentage cases. The correct county is almost always the one where the child lives. Filing in the wrong county can result in dismissal or transfer, which adds months.
When the parents live in different states, the Uniform Child Custody Jurisdiction and Enforcement Act controls. Adopted in all 50 states, the act gives primary jurisdiction to the child’s “home state,” meaning the state where the child has lived with a parent for at least six consecutive months before the case is filed. For infants under six months old, the home state is wherever the child has lived since birth. If no state qualifies as the home state, a court can take jurisdiction when the child and at least one parent have a significant connection to the state and substantial evidence about the child’s welfare is available there. In emergencies involving abuse or abandonment, a court can exercise temporary jurisdiction even when another state is the home state.3U.S. Department of State. Uniform Child Custody Jurisdiction and Enforcement Act
Preparing the Petition
The petition is a standardized court form identifying the child, the mother, and the alleged father, along with the facts supporting the claim of paternity. Most courts require a sworn affidavit from the petitioner stating the basis for that claim, and a separate affidavit is needed for each child.4Administration for Children and Families. Affidavit in Support of Establishing Paternity You will likely need the child’s birth certificate, and copies of any existing custody or support orders if they exist.
Filing fees vary but commonly fall between $100 and $400. Courts offer fee waivers for petitioners who cannot afford the cost, generally based on household income relative to the federal poverty level. File the waiver application alongside the petition; a judge reviews it before the case proceeds. When a state child support agency files on a parent’s behalf, fees are usually handled by the agency.
Serving the Other Party
Filing with the court is only half of opening the case. The other parent or alleged father must be formally notified through service, and a judge cannot rule on the petition until that has happened properly. This is where self-represented filers most often stall their own cases.
Personal service is the standard method: someone who is not a party to the case and is at least 18 years old hands the court papers to the respondent. The server can be a friend, a sheriff’s deputy, or a professional process server. Professional servers typically charge between $20 and $100. After delivering the papers, the server completes a proof-of-service form documenting when, where, and how the papers were delivered, and that form is filed with the court.
If the respondent is in jail or prison, an official at the facility can handle service. If the respondent cannot be located despite reasonable efforts, most courts allow alternative service such as publishing a notice in a local newspaper, but you generally need the court’s permission first. The respondent typically has 20 to 30 days after being served to file a response.
If the Mother Is Married to Someone Else
Every state presumes a husband is the legal father of any child born during the marriage. This marital presumption applies automatically regardless of biology, and rebutting it in court adds a layer of complexity most other paternity cases do not have.
Historically, overcoming the presumption required proof that the husband was physically absent during conception, sterile, or otherwise incapable of fathering the child. DNA testing has changed that, and most courts now treat genetic evidence as highly relevant, though judges are not obligated to disregard the presumption based on DNA alone. Courts also weigh the husband’s relationship with the child, whether the biological father has been involved, and the child’s best interests. If this describes your situation, expect the process to take longer and to involve legal arguments a straightforward case would not, and consider getting an attorney familiar with your state’s rules.
DNA Testing After Filing
When paternity is disputed, court-ordered DNA testing is the primary tool for settling it. After the petition is filed, either party can ask the court to order testing, or a judge may order it on the court’s own motion. The test is a cheek swab collected from the child, the mother, and the alleged father. Blood draws are occasionally used but are less common.
A legally admissible test from an accredited laboratory typically costs $300 to $500. Home DNA kits are cheaper but are not accepted as evidence because they lack the chain-of-custody documentation courts require. Courts generally order the alleged father to cover testing costs if paternity is confirmed, though some courts split the cost or assign it based on who requested the test.
Refusing a court-ordered test is a serious mistake. A judge can hold a noncompliant party in contempt, which carries fines or jail time. More practically, many courts draw an adverse inference from the refusal and presume the test would have confirmed paternity. Refusing often produces the exact outcome the person was trying to avoid.
The Hearing
If the respondent contests paternity, the court schedules a hearing where both sides present evidence. DNA results are the centerpiece in most contested cases, but they are not the only evidence a court considers. Testimony about the parents’ relationship, written communications where the alleged father acknowledged the child, financial records showing support payments, and witness statements can all be relevant.
The petitioner has to prove paternity by a preponderance of the evidence, meaning it is more likely true than not. This is the standard civil burden, well below the “beyond a reasonable doubt” standard used in criminal cases. When a DNA test shows a probability of paternity above 99 percent, meeting the burden is straightforward. Cases without genetic evidence are harder but not unwinnable; courts have decided them for decades on circumstantial proof.
Both parties can be represented by attorneys who cross-examine witnesses and challenge the admissibility of evidence. If the alleged father does not appear after being properly served, the court can enter a default judgment establishing paternity based on the evidence the petitioner presents.
What the Order Does
Before paternity is legally established, an unmarried biological father has essentially no recognized parental rights: no right to custody, no right to visitation, no standing to make decisions about the child’s education or medical care. A paternity order changes that. Once the court recognizes the father-child relationship, the father can petition for custody or visitation on the same footing as any other parent, and joint legal custody is common.
For the child, the order unlocks inheritance rights under intestate succession, eligibility for the father’s health insurance, access to the father’s family medical history, and eligibility for Social Security survivor benefits if the father dies or becomes disabled. The Social Security Administration recognizes a child as eligible if the child could inherit from the father under state law, or if the father acknowledged the child in writing, was decreed by a court to be the father, or was ordered to pay child support before death. The SSA will not enforce state deadlines requiring that a paternity action be filed within a certain period after the father’s death.5Social Security Administration. 20 CFR 404.355 – Meaning of Terms
The order also establishes the father’s obligation to support the child. Courts typically enter a child support order at the same time as the paternity order, or shortly afterward, based on state guidelines that factor in both parents’ income. Many states allow child support to be ordered retroactively, sometimes back to the child’s date of birth, so an alleged father who drags out the process may end up owing a lump sum for past support on top of ongoing payments.
One trap to avoid: paternity without a custody or visitation order gives a father legal recognition but no enforceable parenting time. If you are the father filing the petition, ask the court to enter a custody or visitation order at the same time as the paternity order, or file for one promptly afterward.