"hotelcorporatecodes.com places Fiat Chrysler (now Stellantis) in the "Sometimes" verification tier. A live booking test confirmed the code resolves to approximately 7% savings. The code's rebrand from FCA to Stellantis means two overlapping codes circulate publicly, slightly elevating hotel-side suspicion. FlyerTalk's general Hilton thread notes that automotive OEM corporate codes are moderately checked in Detroit-area properties where staff know the company well enough to ask."

"I don't know what will happen if these hotels, car rental companies, or other providers start asking for corporate identification. It seems problematic. Hopefully it will be that only a few locations, of a few brands, are demanding identification and for a specific reason."

"I know that previously the Hertz IBM rate was always fixed in the mid $30s for a full size vehicle with last car availability. A minivan was $175/week in Orlando even during President's week when the going rate was about $1,200. This is probably why Hertz and at least Avis has been more strict. I have found Marriott to be very strict, especially at key locations, when it comes to the government rate. Marriott wants travel orders, a government ID, and/or a government credit card. I found Hilton to be less strict for those government rates."