I always use a code when I book a Choice hotel, I need an extra 10-15-20% off to incentivize me to say "yes' to Choice - a brand that IMO has way too many substandard/marginal properties in their network - and I'm taking a risk EVERY TIME I book a Choice stay. That's my justification to using codes that don't apply to me...otherwise they WOULD NOT get my business.

To answer your question: I have only been asked for an ID (proof) for a code stay one time (in 100+) and that was 6-8 years ago in suburban Atlantic City. NEVER, NEVER otherwise. Your chances are good, go ahead and use the code - have a B.S. story ready just in case you have the bad luck and get the 1 in 100 check-in clerk who is really doing their job! (the Organization name does appear on the computer so the clerks do know what it is called, so at least have the NAME of the organization for which code you are using in your heard, ready to recite.)

As a consumer, one has the right to get the lowest price possible. It's only fair that you get to lessen the price comparable to other hotel patrons - and a proportionate reduction of the extraordinary sales taxes in many jurisdictions - soak the visitors, not the locals (this is a crime IMO.)