Going through this thread, I see T757205 listed as a MasterCard discount code, but I got it off of the PerksAtWork website - can anyone confirm which one it is? Am seeing a small discount when trying to book a car at Manchester airport for next week, but don't want to use it and then find out I can't pay with Amex!

I also have seen D134100 via another internal corporate site, but it appears to be for RetailPerks. For both RetailPerks and PerksAtWork, theres no membership card or anything, just a link to the Avis website and the AWD to use so no idea how one is supposed to prove to Avis that they are eligible, unless Avis want to watch them logging in to websites?