Originally Posted by struggling1k

Here's a consolidated list. Every code below is confirmed to work as of today. I have them more or less in order of what has worked best for me.

GE NC16700
GE International 13307
IBM 13717
Li & Fung 90010
Samsung 57039
Credit Suisse 12624
AAA 17500
AAA 15985
Credit Lyonnais 13516
Duty Free Shoppers N V 12114
Costco 13365
Bank Atlantic 79103
Senior Citizen 17497
Daimler Benz 99800
Company TVL Rate 68083
Company TVL Rate 23079

A few general comments:

1. GE works the best just about anywhere followed by IBM, but sometimes the Siemens and Samsung rates will amaze you. I just got 70% off at the Grand Hyatt in HK with Samsung for example.

2. I have used these probably 40 times in 10 countries and I get asked for ID 50% of the time. I have a stack of business cards I printed myself and they have worked 100% of the time. Never had a problem, even at times when I thought I may. For example, I have stayed at hotels where I got an exceptional discount to find out it was because the office was right next door (Intercontinental Beijing / IBM) and my self printed cards were not questioned.

3. I don't know about others experience, but I get upgraded 25% of the time using these codes and being "with" these corporations. I still laugh when I hear, "Sir, since you with company X I upgraded you to a suite". My best ever was a two-room suite for $81 a night (IBM discount).

4. On a personal note, these ethical debate is total crap. These hotels are obviously making money at these rates, and why should an executive of a multi-billion dollar corporation get a discount and then an individual pays more? You're leveling the playing field.