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How Is Paternity Established for Child Support Purposes?

If you’re trying to secure child support in Cumberland or Dauphin County, or you’ve been named as a potential father in a support case, one question often comes first: has paternity actually been established? Pennsylvania law requires a legal determination of paternity before a court will enter a child support order for a child born outside of marriage. Here’s what that process looks like.

Why Paternity Comes First

Child support is built on a legal relationship between parent and child. When parents are married at the time a child is born (or within 300 days of the marriage ending), Pennsylvania presumes the husband is the father. But when parents aren’t married, that legal relationship doesn’t exist automatically. It has to be created, either voluntarily or through the court, before a support order can move forward.

Voluntary Acknowledgment of Paternity

The most direct path is a Voluntary Acknowledgment of Paternity (AOP) form. Many parents sign this at the hospital right after the child is born. It can also be completed later through the county Domestic Relations Section or the Department of Human Services. Once both parents sign and the form is filed, it carries the same legal weight as a court order. There’s no need for a judge to get involved.

It’s worth knowing that an AOP is a serious legal document. Once signed, undoing it requires a formal, written rescission sent to the state’s Paternity Coordinator, and there’s a limited window to do so. If you have doubts about paternity, that’s a conversation to have with an attorney before you sign, not after.

When the Alleged Father Doesn’t Sign

If a support case is filed and the alleged father doesn’t sign an AOP at the support conference, the next step is genetic testing. The court will order both parties, and the child, to appear for testing, typically a simple buccal swab. Results showing a 99% or greater probability of paternity are treated as reliable enough to move forward with a support order. A father who wants to dispute results at that point has a narrow legal path; he must show by clear and convincing evidence that the testing itself was unreliable, not simply that he disagrees with the outcome.

If someone who’s been ordered to appear for testing fails to respond or answer within the required time, the court can enter a finding of paternity by default and proceed straight to a support hearing.

Filing a Paternity Action Directly

Paternity doesn’t always come up through a support case. A mother, an alleged father, the child, or, in some cases, the Department of Human Services can file a standalone complaint to establish paternity and request genetic testing, even before any support petition exists. This route is sometimes used by a father who wants to establish his legal rights, including custody rights, independent of a support dispute.

What Comes After Paternity Is Established

Once paternity is confirmed, whether by acknowledgment, testing, or the marital presumption, the legal groundwork is in place for a support order to be calculated and entered. It also opens the door to other rights and responsibilities, including custody and visitation.

Why This Matters for Your Case

Whether you’re a mother trying to secure support or a father facing a paternity claim you have questions about, the details matter. Signing an acknowledgment you’re unsure about, missing a deadline to respond to genetic testing paperwork, or misunderstanding the marital presumption can all affect the outcome of your case in ways that are hard to undo later.

At McDonald Myers Law, Attorney Allissa McDonald Myers helps parents throughout Cumberland County, Dauphin County, and the Greater Harrisburg area understand exactly where they stand and what to do next, whether that means establishing paternity, contesting it, or moving forward with a support case once it’s confirmed.

If you have questions about paternity or child support, call McDonald Myers Law at 717-704-9077 or contact us online to schedule a consultation.

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