"De Beers' Marriott code D86 is for the diamond mining and retail conglomerate. De Beers has a very small global employee base (under 10,000) concentrated in South Africa, Botswana, Namibia, Canada, and London. The code is niche enough that US Marriott front desk staff have limited familiarity. No FlyerTalk or Reddit thread discusses De Beers Marriott verification incidents. The company's small headcount and non-US focus mean hotels are unlikely to encounter legitimate De Beers code users — or to scrutinize them."

"I have been a Platinum for a few years (which implies I frequent Marriott properties on a regular basis) and up until tonight was NEVER asked for any id to justify a corporate rate or discount (I legitimately use a few corporate rates I am entitled to and AAA rates)"

"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."