TL, I DO understand why this escrow check cashing situation would fester with you. If you DID sign fraud paperwork, would you have second thoughts about it down the road? Would there even be any chance of recovery from him? Whatever you do will all work out in the end. If you choose to just let it go, you could think of the $1400 as a cheap buyout of his equity in the house. Indirectly, sort of. God will use this experience for good in your life. I'm willing to bet that your ex knows that you know, and if he ever says anything to you, i'd just say something like you intimated already, something like "i let it go since I thought you really needed the money."
I feel for you in this TL. (hug to you) cc
M 56 H 52 M 13.5 T 15 S 28 twinStep Ds 24 ILYBNILWY BD 1/5/14 OW 4/11/14 Divorce petition efiled 5/5/14 Divorce final 7/8/14