If you are planning your honeymoon or will be visiting a place not long after wedding (3, 6, some hotels will accept even 9, 12 months “old” marriage certificates), don’t forget to mention to the hotel that you are on honeymoon! I did so when making the bookings for the rest of the hotels after our wedding in Seychelles, and in all hotels it was acknowledged. For example, in a small guesthouse on La Digue island we got a nicely decorated room, sparkling wine and some fruits. We also had free business class upgrade on the ferry, I have also heard of people getting room upgrades in hotels.