What signing does
New York's version of a declaration of paternity is the Acknowledgment of Paternity. When properly signed by both parents, it legally establishes the father, with the same effect as a court order of filiation, and it can be the basis for child support, custody, visitation, and inheritance rights. It can be signed at the hospital or later. Other states use different names for similar forms, and valid acknowledgments signed in another state are generally given effect in New York. A separate acknowledgment form exists for certain parents of children born through assisted reproduction.
Rescinding or challenging it
There is a short period after signing during which either signer can ask Family Court to vacate it by petition, and that window can close sooner if a court proceeding involving the child begins. After it passes, the acknowledgment can be challenged on narrow grounds, and courts may refuse to disturb it when the signer has acted as the child's parent and the child relies on that relationship. If there is any doubt about biological parentage, genetic testing before signing is far safer than trying to undo the form later. Keep a copy of what you signed and any related hospital or registry paperwork.
Questions to sort out early
If you have not signed and are unsure, we talk through what testing would involve and what signing would commit you to. If you already signed, we look at when, whether the rescission period has run, and whether any support or custody case is open. A mother seeking to establish paternity when the other parent will not sign usually proceeds by court petition instead. In every version of this question, the child's legal parentage affects more than one future decision, so it deserves care. When more than one man may be the father, a court proceeding is usually the safer way to resolve it.
