Let's hope Marriott will do something about their GC.
It's nothing new about this - I have had so much issues using them in Germany previously that I have decided to give up on it.
The FD manager I talked to said since he worked there there were less than 5 people using the GC. He said it is absolutely ridiculous to train the whole front desk team when only 5 people out of thousands that used the GC to pay.
Using them in the US was seamless but as soon as I was outside the US forget it.
I suspect Marriott might close down the GC payment outside NA - which makes sense since most of their customers are not using GC to pay anyways.