"That being said, I've never been asked to provide any proof. It's not something I just do all the time, but I've never had any problems when I have."

"Toyota's IHG code (954409548) follows the same low-enforcement pattern as Toyota's Marriott code (TOY), which is confirmed as 'Rarely' checked in FlyerTalk's master codes list. Toyota's IHG travel concentrates near manufacturing hubs (Georgetown KY, San Antonio TX, Princeton IN) at Holiday Inn Express and Crowne Plaza properties — property types with minimal verification infrastructure. No Toyota IHG verification incident documented."

"I work for BofA and the internal discounts website didn't list codes, instead directing employees to contact individual properties. I later confirmed the code is 109568. Unless you're employed by one of those companies, I would avoid using these codes. They do often ask for ID at InterContinental properties, though Holiday Inn locations rarely enforce."