"Texas Instruments' Marriott code TXI is a major semiconductor company code. TI HQ is in Dallas TX with major operations in Dallas, Houston, and globally. hotelcorporatecodes.com lists semiconductor/tech company codes at "⚠️ Sometimes" for Marriott. Properties near TI's Dallas-area campuses handle genuine TI employees regularly and may verify. No specific TXI denial documented in FlyerTalk. General Marriott enforcement: select-service essentially never checks; full-service urban 10-20%."

"I have a close friend who is a GM at a Marriott property in a fairly large US city (top 25 metro population). Their opinion is basically, "Hey, it's business. I'm not turning away a paying guest if they don't have the right ID." In this person's younger days as a front desk agent, they enjoyed catching people trying to use a corporate rate that the guest was not entitled to. As they became higher up and saw the books, occupancy rates, etc... Corp ID's became far less important than filling rooms."

"My employer does not have a corporate rate but when I'm consulting for a company that does, I use theirs. I've only been challenged for identification once. In that one situation I explained the consulting arrangement, and the desk clerk accepted it without a badge or business card (neither of which I had anyway)."