What is the name of your state (only U.S. law)? Illinois. I'm in the middle of having one of my parents adopt my child from the other biological parent. But the court document that got served to them they signed their roommates name not their own and sent it in. Now two months later my lawer finally tells me it was wrong signature and has to be redone. The other biological called the lawer and me we all talked and they said they signed it and sent it in themselves. Is this illigal for them to do? To sign someone else's name on their papers hoping it will delay proceedings or just to be an ahole and waste everyones time and money?