A guy wants to send me a postal money order to hold a game until he can pick it up. I told him I would wait for cash on pick up but he wants to show good faith that he's serious. My question is that as long as I cash it at the post office and they deem it legit is there anything that can come back to haunt me weeks later like with the money order scams? When cashing one do you have to show anything more than an I.D.? Do you have to give a credit card number to back up the amount? Does anyone have any experience with these. Thanks