"IBM's Hilton codes (001368083 for International, 0901452 for US) follow the same pattern documented for IBM Marriott. FlyerTalk's definitive IBM hotel thread: "I've used IBM's corporate rate for 14 years at 80-100 nights annually and never once been asked for ID." However, "Newark Airport Marriott religiously asks for ID, requiring a letter from IBM." London Hilton properties have been systematically checking ID since 2022 per documented "London Hiltons requesting corporate ID" thread. IBM is one of the largest corporate travel account holders at Hilton globally."

"My spouse and I usually use his corporate leisure rate for reservations at Hiltons around the world and we have never once been asked for evidence of working for that employer, even when the reservations are in my name."

"I stayed at the Waldorf Astoria Shanghai and wasn't asked. I got asked at the Hilton-affiliated hotel in Japan. The global policy is to check but implementation differs by property."