I've rarely had a problem with points posting and I stay at Marriotts a lot. Maybe it's a Europe thing, as you suggested. Something you might want to do is to visit their website and sign up for email confirmations. They will email you a copy of your bill for each stay you have with them. It's very handy since I have to turn in the original to corporate for reimbursement and don't want to file away paper copies. If you notice that points are missing then just retreive the email and print out the bill or just forward it on to Marriott. It's also a good way to verify that when your company reimburses you that you're getting the correct amount back.