By order of the court only. And your ex husband does have the right to object to such an action.
Single fathers have no rights
prison
The mother is the legal guardian from birth and can give the child any name she wants but she can not sign for the father on the birth certificate. He have to sign it and if she was below age of consent when the child was conceived he can go to prison for statutory rape.
Charles Dickens was 12 when his father went to prison; it was only a few months later that his father was released and Charles was released from his own private prison at Warrens Blacking Company.
Prison
Marshalsea
Linsey was in prison because she committed man slaughter and killed her father
If the father goes to prison his responsibility for child support does not stop. For all practical purposes, he will have no income and will not be able to pay you one cent. Do not expect to get any money out of him while his is in prison.
If they are legally married, the father gets rights until mother gets out of prison, after that it is up to the state. If not legally married, they go into state custody.
did robert e. lee dad go to prison
He was sent to newgate prison
If the mother and this man knew he was not the man it was fraud having him sign it. What he wants to be has nothing to do with the issue, this is about what the child has the right to. There is nothing stopping someone from being a step dad. Whether it would be prison or not depends on many things so ask your lawyer.