"Marriott luxury properties near financial hubs like NYC and SF have dedicated rate integrity teams. The SF Marriott was specifically noted for cracking down on corporate code abuse. HotelCorporateCodes.com rates Goldman Sachs as "Sometimes" for ID checks. No documented full-rate charges found in public forums, but Asian properties are more likely to ask; US properties inconsistent. Business card typically accepted when asked."

"My last couple of corporate RFID cards had no company name on them for security purposes. My current company doesn’t do business cards. I use my Bonvoy card for corporate travel to get the points. I’d have to write them an email standing at the check in desk, I guess."

"I don't do mobile check-in if I'm wanting to upgrade. I check the app before I go in to see if any suites are available to book during the duration of my stay. If there is I just say "Would it be possible to get upgraded to an available suite with my platinum benefit?". Of course this is typically at the hotel that I stay in about once a month for 3 day at a time for work. The front desk pretty much knows me and know that I am fairly low maintenance."