"From Fishbowl (professional network used heavily by Big 4 staff): "How do I use the Acc or E&Y codes at Marriott and get around the ID check piece?" — confirming that ID checks are a well-known friction point for consulting firm codes. The thread attracted replies suggesting telling the front desk "you're a contractor doing work for them." hotelcorporatecodes.com lists EYC with 10-18% discount and verification status "⚠️ Sometimes." FlyerTalk's Marriott enforcement thread confirms consulting firms get checked more often at full-service hotels, but select-service properties rarely verify. US domestic: ~10-20% of stays checked; Europe/Asia: significantly higher."

"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)."

"I wouldn’t mind that at all. Credit Card companies have super weak security and it’s very easy to defraud them - they just pay our money back, and counts that as losses so we’ll sure up about it and keep using the cards What I mind is that the mobile check-in is basically a lie. Marriott is deceiving me. Random hypothetical people that might or might not stole my credit card are not. Hilton works just fine btw"