Awest, the postcard this is epic. What a douchebag, sorry for my french words. LOL.

If he comes to get his mail, I'd give it all to him, including the postcard. He'll know you know. Don't even flinch. And I think it's a great idea that you haven't told him you are filing soon so he doesn't get any sneaky ideas (moving $, etc).

Does the OW's husband know about their affair?