Almost all AWD numbers (begin with ONE LETTER, are NOT coupon codes) are either corporate or association numbers. A relative few are for the general public. Some AWD, which stands for Avis Worldwide Discount, are usable for the public, such as hotel loyalty program AWDs, airline frequent flyer AWDs, public association AWDs (such as AAA), or buyer program AWDs (such as Costco or BJ's Wholesale), trade association AWDs (such as the American Bar Association or National Association of REALTORS), or some other RELATIVELY public company/association/group, etc. Other AWDs are much more restrictive, and just about every AWD is subject to ID, upon request by an Avis team member, but the risk of ID request is fairly low to almost non-existent.

There are a few AWD numbers which are very risky to use without proper ID, because of the high discount afforded by that AWD number, and the high abuse, such as state and federal employee AWDs, and expensive membership programs, such as NetJets/Marquis Jets. The easiest AWDs to FAIL on are credit card associated AWD numbers, which give a good discount at time of reserving online, but then do not work at time of rental, because the attempted user does not have the credit card associated with that AWD, and in order to use that AWD, the subject credit card must also be used too.

In general, most reasonable people would consider any AWD which is unknown (meaning not knowing what company/association/group/credit card it is tied to) to be fairly to very risky, even though the actual chance of getting caught using a VERBOTEN AWD to be fairly small.

I hope that helps you, and others. If I have left anything out, I welcome comments and additions from others.