Originally Posted by
philemer
...Is it up to the hotel or corp. Hyatt?
It is up to the property.@:-) It was the property who charged you, not Hyatt Corp.
US properties are usually more sympathetic, especially if you are just making date changes. Some properties won't issue refund but will provide credit if you book a new reservation. Internationals are more by-the-book. Personally, I wouldn't book non-refundable rate unless I am 99% sure that I will use it.