It isn't charity if you demand something in return

The grocery store I give some of my business to is doing a charity thing right now. They hit their customers up for money at the checkout, the money goes to disadvantaged kids or some such. Fine. I have no problem with that. The problem is that after you give them the money (the amount in this case is $2), they hand you a little slip of paper on which you're meant to write your name. Later on, they put all of the little papers up on the wall near the checkouts, so that everyone can see just how generous they've all been. That's the part I have trouble with. I have trouble with the idea that people demand recognition for their acts of charity. It's like the Livestrong bracelets that were so popular a couple of years ago. It's not enough to just give money for cancer research. People need others to know and acknowledge that they've given money. "Look at me! I'm terribly thoughtful, nice, and charitable." We're not giving for the sake of others. We're not giving to feel like we've done something good. We're giving so that other people will know how wonderful we are. That's my problem.