Currently you have no custody orders established. While the "letter" could be deemed an enforceable agreement, the father would have to first file a petition to establish custody and attempt to enforce the agreement. At that point, you could outline the reasons for why you may be reluctant to permit your daughter around him (or why she is refusing to go). I would suggest talking to a lawyer for more information.
Answered on Jul 22nd, 2013 at 12:38 PM