He mailed a payment last Saturday. Monday, I check the web site and the payment was ALREADY posted. It was dated on Sunday. He mailed a check through snail mail. It went in our mailbox on Saturday. My question is, how did they do this? Most places don't even get mail deliveries on Sunday. Does FirstUSA have PO Box that gets mail posted on Sundays and they work 7 days so pick it up? I kept thinking it would be a mistake and they'd change it to a later date. Well, today he got his bank statement, and the check was in there--showing a date stamp from FirstUSA of August 10 (Sunday!) I've never seen a payment post so quickly!