How to Legally Establish Paternity in Wyoming: DNA Tests, Court Orders, and Timelines

Welcoming a child outside of marriage in Cheyenne, Casper, or anywhere across Wyoming creates an immediate legal gap that surprises many new parents. Even if both parents live together and agree on who the biological father is, an unmarried father has zero enforceable custody rights, visitation privileges, or medical decision-making authority until someone acts to legally establish paternity in Wyoming. At the same time, the child cannot legally claim child support, health insurance coverage, Social Security survivor benefits, or inheritance rights from the father without an official determination of parentage.

All parentage procedures in the Equality State are governed by the Wyoming Parentage Act (Wyo. Stat. Ann. § 14-2-401 through Wyo. Stat. Ann. § 14-2-903). Under Wyo. Stat. Ann. § 14-2-501, a legal father-child relationship is established only through a statutory marriage presumption, a valid voluntary acknowledgment, an adoption decree, or an adjudication by a Wyoming District Court. Choosing the right pathway early prevents expensive custody battles and protects both parents from irreversible legal missteps.

Voluntary Acknowledgment vs. Court-Ordered Paternity in Wyoming

Before filing paperwork, parents should determine whether their situation qualifies for a cooperative administrative filing or requires a formal judicial proceeding. Under Wyo. Stat. Ann. § 14-2-504, a man is automatically presumed to be the legal father if the child is born during a marriage or within 300 days after the marriage ends by divorce, annulment, or death. For unmarried parents, however, Wyoming law provides two primary paths to establish legal fatherhood.

Voluntary Acknowledgment at the Hospital or Vital Statistics Office

When both unmarried parents are certain of the biological relationship, they can execute Form VSS-AOP, Wyoming, Vital Statistics Services, Affidavit Acknowledging Paternity right after the baby is born at a birthing center or hospital. Hospital staff provide the form, witness or notarize the parents' signatures under Wyo. Stat. Ann. § 14-2-602, and forward the record directly to Wyoming Department of Health, Vital Statistics Services, Cheyenne so the father's name appears on the original birth certificate.

If the mother was married to someone else at the time of conception or birth, or within 300 days prior to birth, the biological father cannot simply sign the affidavit alone. Under Wyo. Stat. Ann. § 14-2-603, the mother's husband (the presumed father) must simultaneously sign Form VSS-DOP, Wyoming, Vital Statistics Services, Husband's Denial of Paternity. Once both forms are properly filed with the state registrar, Wyo. Stat. Ann. § 14-2-605 gives the acknowledgment the exact same legal weight as a District Court judgment without anyone ever stepping into a courtroom.

Filing a Petition to Adjudicate Parentage in District Court

If either parent has doubts about biological fatherhood, if the mother refuses to put the father on the birth certificate, or if an alleged father denies responsibility, parentage must be resolved through a civil lawsuit under Wyo. Stat. Ann. § 14-2-801. Under Wyo. Stat. Ann. § 14-2-802, standing to file belongs to the child, the child's mother, a man whose paternity is to be adjudicated, or the state support enforcement agency. The Wyoming Supreme Court emphasized in Matter of Paternity of TS, 917 P.2d 183 (WY Supreme Court 1996) that courts must strictly follow the statutory procedures of the Parentage Act to protect the due process rights of the parents and the child.

Costs and Rules of Court-Admissible DNA Testing in Wyoming

An over-the-counter pharmacy DNA kit cannot be used as evidence in a Wyoming courtroom. Under Wyo. Stat. Ann. § 14-2-703 and Wyo. Stat. Ann. § 14-2-705, genetic testing must be performed by a laboratory accredited by the Association for the Advancement of Blood and Biotherapies (AABB) with a strict documented chain of custody, including government photo ID verification, thumbprints, and photographs taken at the collection clinic. To establish paternity legally, the genetic test report must show at least a 99% probability of paternity and a combined paternity index of at least 100 to 1.

Private court-admissible chain-of-custody DNA tests in Wyoming typically cost between $300 and $500 for a mother, child, and alleged father trio. However, if a case is opened through the state child support agency, the state contracts with accredited labs to provide testing at a dramatically reduced rate of approximately $60 to $150 total. Under Wyo. Stat. Ann. § 14-2-706, the party requesting the test-or the state agency-initially advances the fee, and the court frequently orders the confirmed biological father to reimburse the testing cost at the end of the case.

Step-by-Step Process in Wyoming

Whether you reside in Cheyenne, Casper, Laramie, Gillette, or Rock Springs, establishing paternity through the judicial system follows a structured civil procedure in your local District Court.

Step 1: Choose Between State Child Support Services or a Private Court Action

If your sole objective is establishing legal paternity and obtaining a child support order, you can submit Form DFS-CS-101, Wyoming, Department of Family Services, Application for Child Support and Paternity Services to a local office such as Wyoming Department of Family Services, Child Support Program, Cheyenne, Wyoming Department of Family Services, Child Support Program, Casper, or Wyoming Department of Family Services, Child Support Program, Rock Springs. However, state attorneys represent the state's financial interest and cannot litigate custody or visitation schedules. If you want a parenting plan, legal custody rights, or residential visitation, you generally need to file a private District Court action or hire a Wyoming family law attorney.

Step 2: Prepare the Petition and Confidential Financial Affidavit

To start a comprehensive court case, complete Form ECVSP 05, Wyoming, Judicial Branch, Petition to Establish Custody, Visitation, and Child Support along with Form ECVSP 06, Wyoming, Judicial Branch, Summons. Because Wyoming courts determine child support alongside paternity, you must also complete Form ECVSP 10, Wyoming, Judicial Branch, Confidential Financial Affidavit and attach your last 2 years of federal tax returns and recent pay stubs.

Step 3: File with the Clerk of the District Court

In Wyoming, paternity lawsuits are filed with the Clerk of the District Court in the county where the child or the respondent resides. Depending on your location, you will file at Laramie County District Court, First Judicial District, Cheyenne, Natrona County District Court, Seventh Judicial District, Casper, Albany County District Court, Second Judicial District, Laramie, Campbell County District Court, Sixth Judicial District, Gillette, or Sweetwater County District Court, Third Judicial District, Green River.

Step 4: Complete Formal Service of Process

After the clerk stamps your pleadings and issues the summons, the respondent must be formally served by a county sheriff's deputy or a private process server. Once served inside Wyoming, the respondent has strictly 20 days to file a written Answer with the court (or 30 days if served outside the state).

Step 5: Complete Buccal Swab Genetic Testing

Under Wyo. Stat. Ann. § 14-2-702, if either party submits a sworn statement alleging or denying a possibility of sexual contact during the conception window, the District Court will order genetic testing. Both parents and the child attend scheduled appointments at an approved collection facility for a painless cheek (buccal) swab. If a party wishes to contest the lab results, Wyo. Stat. Ann. § 14-2-813(a) requires filing a formal written objection within 14 days after receiving the report.

Step 6: Obtain the Final Order Adjudicating Parentage

Once genetic testing confirms paternity at 99% or higher, the judge enters an Order Adjudicating Parentage. As illustrated in In re Paternity of HLG, 368 P.3d 902 (WY Supreme Court 2016), the District Court will also establish a detailed parenting plan, legal custody arrangement, and monthly support calculation based on the child's best interests. Finally, the court clerk transmits a certified record to Wyoming Department of Health, Vital Statistics Services, Cheyenne under Wyo. Stat. Ann. § 35-1-411 to amend the child's birth certificate.

How Much Does it Cost in Wyoming?

The total cost to establish paternity in Wyoming depends on whether parents cooperate voluntarily or litigate custody and support in District Court:

• Voluntary Acknowledgment at Hospital: $0 statutory filing fee under Wyo. Stat. Ann. § 14-2-606 when signed at the hospital within days of birth.
• Post-Hospital Birth Certificate Amendment: $30 to $55 paid to Vital Statistics Services if filing an acknowledgment later and ordering an updated certified birth certificate.
• District Court Filing Fee: $160 mandatory civil filing fee under Wyo. Stat. Ann. § 5-3-206(a) across all county District Courts.
• Wyoming Child Support Program Application: $25 one-time application fee (waived for families receiving public assistance).
• Sheriff Service of Process Fee: $50 for the county sheriff to serve the summons and petition on the other parent.
• Family Law Attorney Fees: $2,000 to $5,500+ in typical retainer and hourly fees (averaging $225 to $350 per hour in Wyoming) if the case involves contested custody or visitation hearings.

How Long Does the Process Take?

The timeline for establishing paternity in Wyoming varies significantly based on the chosen legal route and whether the other parent cooperates:

• Voluntary Acknowledgment at Birth: Immediate upon signing, with the official birth certificate issued by Wyoming Department of Health, Vital Statistics Services, Cheyenne within 2 to 4 weeks.
• DNA Laboratory Processing: Once cheek swabs are collected from the mother, child, and alleged father, accredited laboratories generally return certified genetic test reports within 2 to 3 weeks.
• Uncontested District Court Petition: When both parents cooperate with service and genetic testing, a court-ordered paternity case typically concludes in 60 to 90 days.
• Contested Paternity and Custody Litigation: If a party evades service, disputes genetic testing, or fights over primary residential custody in Sheridan County District Court, Fourth Judicial District, Sheridan or Teton County District Court, Ninth Judicial District, Jackson, the case generally takes 6 to 12 months to reach a final trial order.
• Statute of Limitations: Under Wyo. Stat. Ann. § 14-2-806, if a child has no presumed, acknowledged, or adjudicated father, a proceeding to adjudicate parentage may be commenced at any time, even after the child reaches adulthood (though child-initiated suits must be brought within 2 years after reaching the age of majority if challenging an existing relationship). If the child already has a presumed father through marriage, Wyo. Stat. Ann. § 14-2-807 imposes a strict 5-year deadline from the child's birth unless the presumed father and mother never cohabited or engaged in sexual intercourse during the conception window.

Because a paternity order permanently shapes your parental rights and financial obligations until the child turns 18, navigating the court system alone carries major risks. You can browse our directory of vetted Wyoming family law attorneys to find an experienced local lawyer in your county who can protect your custody rights and handle every court filing.

Frequently Asked Questions (FAQ)