"Hyatt Senior Citizen rate (17497) is a leisure discount, not a corporate code. FlyerTalk confirms: "World of Hyatt Senior Discount — no company ID required, just age verification at some properties. Front desk may ask for ID to confirm age." This is a publicly advertised promotional rate, not an employee benefit code. Age can be verified by any government ID. Risk of rate-challenge at check-in is essentially zero."

"Costco's Hyatt code (66267) is a Costco member discount, not a Costco employee code. FlyerTalk discussion: "Costco Travel arranges negotiated rates for Costco members — this is a published membership rate, not a confidential corporate employee benefit." Costco members must show membership card at check-in, not an employee badge. The verification risk is minimal: Costco membership is easy to obtain and the card is easy to carry."

"Strangely enough I have never been asked for Corporate ID, even internationally, at either Hilton or Starwood when I book using a corporate discount code. Yet another reason why Hyatt is a distant fourth in my hotel choices."