"Kroger's Marriott code KRO is a major grocery retail corporate code. No FlyerTalk thread discusses KRO verification incidents. Kroger has 500,000+ US employees making ID verification impractical. Grocery retail corporate travel primarily occurs at select-service properties (Courtyard, Fairfield) near distribution centers and regional offices — property types that essentially never verify corporate codes. hotelcorporatecodes.com lists retail codes as "low enforcement" overall."

"Bank One's Marriott code BOB may still exist in Marriott's GDS system following the 2004 acquisition by JPMorgan Chase. JPMorgan has a separate Marriott code (JPM). Legacy acquired-company codes are practically never verified as the hotel has no way to confirm employer identity for a company that no longer exists independently. Risk for legacy codes is negligible."

"Same- we stay at a very large Jw often just for a quick get away and have gotten to know a few of the staff. We’ve checked in numerous times and have been told there aren’t any upgrades - I’m Platinum. No worries, we’re just happy to be on vacation for a few days. Shortly after we’ve seen a specific front desk agent that is always friendly with us and she has upgraded us (yes, after we’ve checked in) at least three times…. And mentioned as she’s doing it, “idk why they didn’t upgrade you…. “ we never asked her since we were already checked in and we’re fine with the regular room. But certainly, a suite is a nice upgrade and very much enjoyed."