Verifying Paternity and Challenging a Child Support Order in Minnesota
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Reviewed & verified by A. Jason Velez, Esq.*
Managing Attorney, 1LAW · Last reviewed January 26, 2026
Legal Inquiry
Consumer Legal Issue
I need help getting off child support for a child that's not mines.
The mother of the child was cheating with her so called family members that looks like me, so I kinda got trapped into this. Even the mom told me that wasn't my kid and that she just used me to support her and her family.
Attorney Answer
Start with how paternity was established, not with a DNA test. If you signed a Recognition of Parentage and it was filed with the state registrar, Minnesota Statutes § 257.75, subd. 3(a) says that with no competing presumption of paternity a court may not allow a further action to determine parentage as to you — and under subd. 4(a) the court orders blood tests only after someone brings an action to vacate the recognition and the court finds a prima facie basis of fraud, duress, or material mistake of fact. The testing comes out of that motion; it is not what gets you in the door.
So the first thing to pin down is how paternity was originally established. If it was established by signing a Recognition of Parentage (common for unmarried parents), Minnesota Statutes § 257.75 sets strict limits on undoing it: a signed recognition can be revoked within 60 days, and a later action to vacate it for fraud, duress, or a material mistake of fact must generally be brought within one year of signing, or within six months of getting genetic-test results that contradict it. Depending on how long ago the recognition was signed, that window may already be closing or closed. If paternity was instead established through a court order, the process and deadlines for reopening it are different, though that depends on facts not established here.
What you can do:
1. Determine exactly how paternity was originally established — signed Recognition of Parentage or court order — and when that happened.
2. If a Recognition of Parentage is involved, bring the action to vacate it for fraud, duress, or material mistake of fact. That filing is what puts genetic testing on the table — under Minnesota Statutes § 257.75, subd. 4(a) the court orders blood tests once it finds a prima facie basis for vacating — so don't burn the window trying to get a test ordered first.
3. If a Recognition of Parentage is involved, calculate how much of the one-year (or six-month, post-testing) window under Minnesota Statutes § 257.75 remains.
4. Consult a Minnesota family law attorney to file the appropriate petition to disestablish paternity.
⏱ Time limits apply. Minnesota Statutes § 257.75 generally allows only about one year from signing a Recognition of Parentage, or six months after contrary genetic-test results, to seek to vacate it for fraud or mistake. A local family law attorney should review the exact dates promptly to confirm whether that window is still open.
Relevant Case Law
Custody of the Child of Williams v. Carlson, 701 N.W.2d 274 (2005) — Court of Appeals of Minnesota
Because (1) appellant failed to timely move to vacate the recognition of parentage; (2) the record supports the court’s findings regarding the best interests factors; and (3) no errors occurred during trial that unreasonably prejudiced appellant, we affirm.
It shows that in Minnesota a DNA test contradicting a signed Recognition of Parentage does not undo it unless a motion to vacate is filed within the statutory deadline - the exact timing trap the answer warns about.
Read the full opinion (CourtListener)
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Courts & Legal Aid in Minnesota
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Frequently Asked Questions
How can someone challenge paternity if they believe they aren't the biological parent?
It depends on how paternity was established. Where it rests on a signed and filed acknowledgment — in Minnesota, a Recognition of Parentage — the first step is a timely action to vacate that acknowledgment, not a test: under Minnesota Statutes § 257.75, subd. 4(a) the court orders blood tests only after it finds a prima facie basis for vacating.
Is there a deadline to challenge a signed acknowledgment of paternity?
Many states impose a limited window, often around one year from signing, or a shorter period after receiving contrary genetic test results, to contest a signed acknowledgment for fraud or mistake.
Can child support be stopped once paternity is disproven?
Generally, disestablishing paternity through the proper court process can lead to ending the support obligation going forward, though past-due amounts may be treated differently depending on the state.
