I've never had this before. I just happened to glance at our letter (on the frig) last night. In tiny letters under where it shows what they've received, it says: Remaining package amount is $738.29 is due by 05/05/05***No additional notices will be sent. I have the passholder room only offer. On the back it still has the 5 day cancel policy. we don't check in until 5/26. both times I called (for the original ressie and then to modify with the ap rate), I was told balance is due at check-in. I am calling this morning. Good thing I saw this as today is 5/2!!!!!!