"In the US, never have been asked about work IDs when booking or staying on a corporate rate. The few times I've been to Japan it was a different story."

"Hilton code for General Motors is not confirmed in major public corporate code databases, suggesting limited circulation. GM's geographic concentration in Michigan (Detroit, Warren, Flint) means Hilton properties in those markets are familiar with GM employee IDs. However, outside the Midwest, the code is less likely to trigger targeted verification. Mid-range Hilton brands (DoubleTree, Hampton) rarely verify."

"I have a client that requires me to use their rate when traveling on their dime. I've never been asked to provide ID — I can simply say I'm a contractor."