What Happens if a DNA Test Shows You Are Not the Father in Ohio?

 Posted on October 28, 2026 in Family Law

A DNA test showing you are not the biological father does not automatically end your legal obligations in Ohio. If paternity was already established, you can legally challenge it. Your options depend on how fatherhood was established and what you knew at the time. Even a reliable test cannot cancel a court order on its own. Our Wadsworth, OH family law lawyers can explain your options in 2026.

How Is Legal Paternity Established in Ohio?

If a child is born during a marriage, the mother's husband is presumed to be the father. That presumption can also apply within 300 days after a marriage ends. DNA evidence can challenge the presumption, but the correct legal process still matters.

Unmarried parents can sign an acknowledgment of paternity. Once filed and final, it establishes legal fatherhood without a court hearing. A child support agency or court can also establish paternity. These decisions can create support obligations and affect parental rights.

How Do You Cancel an Acknowledgment of Paternity in Ohio?

Ohio gives either signer 60 days after the last signature to begin rescinding an acknowledgment of paternity. The person must request a paternity determination through the child support enforcement agency and notify the state in writing. You do not need to prove fraud or a mistake during this initial period. Genetic testing and an administrative order are part of the process.

After the acknowledgment becomes final, you can challenge it in court based on fraud, pressure to sign, or a major factual mistake. Under Ohio Revised Code § 3111.28, you must file within one year after it becomes final. DNA results could support a mistake claim. Still, you must meet the legal requirements. Simply showing that you are not the biological father does not automatically prove fraud or mistake.

Can You Challenge Paternity Established by a Court or Child Support Agency?

You might challenge a paternity or support order even years later. Ohio Revised Code § 3119.961 allows a motion asking the court for relief. This process does not have the same one-year deadline as the acknowledgment challenge.

Genetic testing must show a zero percent probability of fatherhood. The test must be performed within six months before filing your motion. Relief is unavailable if you adopted the child or the child was conceived through qualifying artificial insemination. The court must also deny your request in certain cases if you already knew you were not the biological father. For example, this can apply if you knew before signing an acknowledgment of paternity.

Can a Court Refuse to Change Paternity Despite DNA Results?

Courts cannot deny relief simply because a child has a close relationship with you. When the conditions are met, the court must grant relief. The child's best interests are not a separate reason to refuse it.

The court must also review any existing parenting time or visitation orders. It can continue, change, or end those rights. Consider the relationship you want with the child before seeking relief, because your legal rights may change.

What Happens to Child Support After Paternity Is Set Aside?

Do not stop paying court-ordered support because you received an unexpected DNA result. The support order remains enforceable until a court changes it. That remains true even when another person is willing to acknowledge being the biological father. Unpaid amounts can accumulate while your case is pending, and enforcement action remains possible.

If you obtain relief, the court can end your future support obligation. It may also cancel unpaid support, but cancellation is not automatic. Recovering payments already made is a separate issue and is not guaranteed. Keep accurate records of payments and any amount the child support agency says you still owe.

What Should You Do After a DNA Test Proves You Are Not the Father?

Taking these steps can help protect your rights:

• Find the acknowledgment, court order, or agency decision that established paternity.

• Record when you signed documents and when you learned about the DNA results.

• Ask whether you need court-approved genetic testing.

• Keep paying support until the court changes your order.

• Save payment records and any documents concerning custody or parenting time.

• Speak with an attorney before filing or signing new paperwork.

If your motion for relief from a support order fails, Ohio law requires you to pay court costs and the opposing party's reasonable attorney's fees. Medina County paternity matters can involve juvenile or domestic relations court, depending on the original case.

Contact Our Summit County, OH Paternity Attorneys Today

Our attorneys bring 21 years of combined legal experience to Ohio family matters. We can review how paternity was established, explain your options, and address support and parenting concerns.

Contact The Law Office of Whitney K.S. Miller, LLC at 330-725-4114 to talk to our Wadsworth, OH family law lawyers today.