I didn’t explain myself properly with my prior post.
We got a stamp from Staples that has our group name, time we meet and the address of the meeting and a blank line for initials. What I've seen work with court cards is to have someone at the door colleting the cards, then we place all the stamp cards at once on the table next to our literature. That way they can stay for the meeting or leave if that's what they want. My home group haven’t ran into a problem with it (yet). At first we were signing them, then we thought it would be a better idea to get a stamp and it seems to be working.
So, with that said. If that card was given to me to sign, I would have stamp it and given it back.
A reality check.
Just a few days ago, I heard a story about an addict doing a robbery during meeting time and then providing "proof" he was at a NA meeting during that time because someone stamped his card at the beginning of the meeting rather than the end.
Some are sicker then others.
Ivan