"MIT's Marriott code 363006 is a university institutional code. No FlyerTalk thread discusses MIT verification incidents. University codes at Marriott are used primarily for conference and research travel — a use pattern hotels accommodate with minimal scrutiny. MIT has strong presence near Boston (Kendall Square), where Marriott properties are plentiful and familiar with academic corporate rates. No verification-denial case documented. University codes are among the lowest-enforcement categories across all major hotel brands."

"I have never been asked and I have 51 nights in a Marriott this year using our corp rate."

"In North America I've been asked a single time in the 15 years I've been using Corp rates (for a few years I'd use them on multiple stays per week). My trick is to approach the counter in a friendly way, ask how they are doing, maybe ask an easy question about the hotel (where's the gym?) and connect with them (boy it's hot out there today!) They are happy to have met you, it is a pleasant experience, and you go on your merry way. I'm also Titanium for life and currently have Ambassador, but I've done this when Gold and Platinum. For that one time they asked I said I had actually just started and didn't have my business cards yet, but should have them for my next stay and they let it go. I was never asked by that hotel again (Courtyard Bellevue on an Accenture rate.) Doing a mobile check-in will also shorten the time spent. Just have your ID and card ready to speed things along."