"Philips' IHG code (953100013) is for the Dutch electronics and healthcare company. IHG enforcement is brand-tier dependent: InterContinental properties in Amsterdam (Philips' HQ city) and other European markets are most likely to verify. Holiday Inn Express properties in the US: essentially never check. Philips has major operations across Europe, North America, and Asia — IHG InterContinental in those regions carries moderate verification risk. FlyerTalk general IHG warning: "They do often ask for ID at full-service properties.""

"A former Siemens employee posting on FlyerTalk noted: "When checking in as a group of Siemens employees, we were never asked for ID. However, when traveling alone, front desk staff often asked for some form of ID." IHG enforcement is highly fragmented across its franchise network. Siemens's code falls into the mid-tier corporate bucket. At InterContinental/Kimpton properties, verification is near-certain; at Holiday Inn Express, essentially never. IHG's 2018 T&C update explicitly added unauthorized corporate rate use as grounds for account closure."

"This Deloitte code circulates widely among current and former staff. IHG auditing materials note that large firms like Deloitte and IBM have codes hard-coded into IHG's auditing software to trigger a request for ID. The "Stop at Desk" flag has been observed: certain high-value codes block issuance of a Digital Key until physical ID is presented at the front desk."