"Sprint's Marriott code SPR is a telecom code. Sprint (now part of T-Mobile) had major HQ in Overland Park KS. Properties near that corridor still encounter Sprint-branded employees during the merger transition. hotelcorporatecodes.com lists SPR with "⚠️ Sometimes" verification. Telecom codes are in the medium-enforcement tier — more commonly audited than retail, less than consulting/finance. No SPR-specific denial incident found in public forums."

"I think the generic 'show corp id' designation means show the company business card. I think a lot of us don't have them or, if we do & we're not going to an office that we'd need to show them, leave them at home. I worked for some F500s that didn't require corp ids with shiny smiling faces on them & others that did; same with company credit cards. All, however, provided biz cards when working for them."

"I have stayed 100s of times with various corporate rates (including Japan) and the only hotel that has asked is W hotels. Even then they didn’t push much. I have been a consultant for 20 years and many clients require you to use their rates when they are paying the bill. The hotel doesn’t have an up to date list of every employee that works for a company globally. The woman at the W said “I don’t really care, just show me anything on your phone that says your name and that company. You can type an email now “."