My question involves name change laws in the State of: Washington
I want to change my daughter's last name to my husband's last name. Her biological father and I were never married and he isn't on the birth certificate and hasn't seen or done anything for her before she turned 1. He's in jail and we've lost any contact with each other for a long time. It says I need to try to contact him but how am I suppose to contact him if I don't even know where he's at, all I know is that he's in jail somewhere. Can I change my daughter's last name without the biological father's consent since he's not on the birth certificate?

