The answer to your question is no. A Category 5 hotel is outside the range for which the certificate is valid (Categories 1 - 4 only) . However since the question and answer seem so obvious, I am sure I must be missing something. So if you would post additional information about your situation, perhaps more help could be provided by someone, if not by me. . The only situation where this could be possible would be if the Category 5 hotel you want to stay at was previously a Category 4 hotel before the category changes implemented for several hotels on 08MAR2011. But even if that were the case, you would have had to have confirmed your reservation prior to 08MAR. If the hotel didn't upgrade from a 4 to a 5 on 08MAR this would not be possible at that hotel. If the hotel category DID increase, but your reservation wasn't booked by that date, it's too late to do it now.