Moderator, Marriott Bonvoy & FlyerTalk Evangelist
Join Date: Oct 2002
Location: McKinney, TX, USA
Programs: United Silver; AA Plat/2MM; Marriott LT Titanium; Hilton Gold
Posts: 11,775
That matches my experience using them as well. I always turn them in when I check-in. Now if I'm staying at a hotel on a BB rate, the hotel staff usually won't give me the BB until check-out time.