I did the same thing last year. Through RTSports. Man, gives me nightmares giving away SA for some second level RB and a Ok WR. Can't remember who. I hit what I thought was the reject button, but I guess I hit the accept button. Next time, a hour or so later, I log in and SA is gone, on his roster!! Good thing the offer was way outta line.
Get both sides. If one is lying, you have a little time to find another owner. Fowarding an e-mail is possible.
Deluxe Sig By Deluxe_247