You can be forced for intents and purposes, I.e., "well, you're charged with a DUI. I can set your bail at $30,000, or I can release you on your own recognizance if you go to 3 meetings a week- and bring a log, initialed by the group leader, attesting to the fact." Or, "we'll, you've been convicted of that same DUI. I can give you six months in the county jail, or I can give you probation with regular aa meetings / drug testing / alcohol monitoring." I've known literally hundreds of people offered such "choices." And I've represented one or two who were all too happy to tell the judge to go scratch,and that they'd take their 6 months and live as they pleased. The poor man's rehab! The two who come to mind both drank themselves to death, or course, as is not unexpected of one who'd choose jail over enforced sobriety. (A false dichotomy, as there is alcohol in jail - google "pruno" for the gory details. In the best of circumstances it is made in a plastic bag. In more desparate conditions it is made in a toilet, cleaned as circumstances allow and reserved of course for that exclusive purpose, the cell-members using adjacent cells for ordinary toilet business. It takes a village...but I digress.)
I can't speak to any larger picture, but local practice - and here I mean throughout the state of California - is for the group leader or some designee to be expected to initial some sort of informal "log" kept by an attendee who requests it. I have in fact created many such logs for clients' use,and have never had a complaint that there was no one at the meeting to initial it. There is of course no mechanism for verification; some non-zero percentage of those logs are surely being initialed by chuckling bartenders, no doubt...