"Siemens has multiple Hilton codes (D323009803, 323009803, N0079268, 302844100) reflecting different business units and tiers. hotelcorporatecodes.com notes Siemens in the "Sometimes" category at Hilton. UK/Europe Hilton properties have increased enforcement since 2022 — Siemens has major Munich HQ operations where Hilton properties regularly encounter Siemens employees. FlyerTalk's London Hilton enforcement thread documented: "show a company ID card, or pay the full walk-up rate." German Marriott properties near Siemens facilities: medium-high risk."

"I spent 5 bucks and printed a business card and ID for the code I use the most."

"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."