The norm would be to go to the police and a judge would issue a protection order.
But this little thing paper deal appears to have been a secret between Larry and Howard. I'll bet Anna didn't even know about it and if she signed it, she didn't know what the hell she was signing.
I'd sure go back and see about the dude in jail. Somehow, I doubt that he got to tell the real story against the lies of Howard and Anna.