"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 for ID in any hotel booking, even when using a rate code for personal travel."

"I've been given codes for several chains from family/friends who are entitled to have them. All have assured me they have never been asked to provide company ID when checking in. In fact I was told they give the codes out to visiting clients who won't have ID anyway."