You cannot get your money back; however, you should immediately take steps to get the order terminated.
Answer
You cannot terminate the support in 20 states period, and in most of the other 30, you had just 24 months to learn you were not the father, so you're likely stuck. You could file for custody. Though you cannot use paternity to stop the support, she can use it to stop you getting custody in every state except PA. But, if she does, she forfeits her claim on you, allowing her to file a retroactive order on the bio dad. Unfortunately, you cannot recover your money through the system, though you could attempt a personal lawsuit. But, recently a Clay County (MO) judge ordered Welfare to refund a father everything he's paid, though I'm sure it will be appealed.
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You haven't explained whose birth certificate. If it's her biological child then she must sign the birth certificate. The biological parents of the child sign the birth certificate.
Yes, a man who signs a birth certificate is legally considered the father of the child and can be required to pay child support.
No, child support can only be taken from the birth parents.
If you sign a birth certificate and the child is not biologically yours, you may still be legally considered the child's father and have parental responsibilities, such as child support and visitation rights. It is important to be sure of paternity before signing a birth certificate.
No. However, if the alleged father has signed the birth certificate, he is acknowledging that the child is his. There are steps to take in order to be taken off of the birth certificate and relieved of the obligation of child support, including a paternity test and an amendment to the birth certificate.
Yes and he still have to pay whether he signs the birth certificate or not.
Yes, if/when paternity is established.
If the father signs the birth certificate, he legally acknowledges paternity of the child. This means he may have rights and responsibilities, such as custody, visitation, and child support.
The man who signed the birth certificate is the child's legal father until/unless a court rules otherwise, and can be made to pay support.
Unlikely. Your husband is the legal father of the child.
Not signing a birth certificate does not remove one's responsibility. If you are not the bio parent of the child, attempt to arrange for testing that will be evidence of that. Otherwise, you are the parent of a child.
The father can file for this change.