Don't know how close you are to the airport, but if you're close enough, I'd rebook this one with either the Florida visitor's code or the Orlando Conventions code and drop the first car off and get a new one. I'm betting that the counter person actually screwed this up, because even if it was flagged to ask for ID, the ID they needed was the ASAA one (not that you have that either) as this code has never been previously associated with Avis employee discounts.

On that thought process, the well known Avis employee code A153790 pulls up information about "Avis Travelers" when you input it at the end of https://www.avis.com/car-rental/profile/go.ac?

Other company AWD's do the same thing. However, codes associated with association or membership groups don't. (Such as Costco, Entertainment book, etc) The code you used acts the same way, pulling an error message rather than info about "Avis Travelers."

Not that any of that helps; mostly just for discussion on whether this has code has become an Avis only code.