"Hyatt is quite strict about checking identification, especially in their hotels in Asia and Europe. Hotel in question may require employee verification."

"Agree with your 1-3 Your #4 has not been true - for me While an anecdotal data point: If the hotel does ask for proof (around less than half the time) a badge or business card has always sufficed for me - I have hundreds of stays around the world on discounted corporate rates I’d wager the OP has a 99.x % chance of success if he has an employee badge"

"There are two types of corporate rates: Hyatt Chainwide, and company-negotiated. If the rate simply says the company name, such as "Accenture" as the rate on the booking page, then the company has negotiated an advantageous rate directly with that specific hotel. You are much more likely to be asked to show proof of employment at check-in with a negotiated rate than you are if you're simply using the Chainwide rate. As someone mentioned, in Asia they'll almost definitely ask, especially for a negotiated rate."