Originally Posted by flightexpert

My pleasure, TennisNoob

They usually do not ask for ID or other proof of discount eligibility, but if they do, you could be stuck with the walk-up rate, which can be costly. They're not going to arrest you if you get busted, you'll just suffer some mild embarrassment.

Then, once you've gotten over your shame at trying to scam Avis, refuse the walk-up rate (unless it's good) and saunter on over to the Budget or Dollar counter where you had a back-up reservation in case this happened, 'cuz you're a smart traveler like that