With over 80% of our nights in non-US properties, this problem has become the order of the day for us. From my records, I have had to contact Marriott for 58 nights year-to-date that failed to show up for the following properties:
JW Bangkok
Courtyard Bangkok
JW Kuala Lumpur
JW Jakarta
JW Surabaya
Renaissaince Kowloon Hong Kong
Renaissance Manila
Marriott Brussels
Marriott Ghent
Marriott Frankfurt
Marriott Budapest
Marriott Prague
Marriott Ledra Athens
Courtyard Rome Fiumicino
Marriott Guarulhos Sao Paulo
I don't know why Marriott isn't doing anything to rectify this problem, which has lasted for as long as I can remember.