I donated two huge bags of clothes to local charity shop. Before I could even ask a question the woman who worked there demand my postcode for gift aid. I said my husband deals with that and I explained I wasn't comfortable giving his details without his permission. She then said, I was extremely rude and it was for gift aid and she was running a business. In no way was I being rude (which I told her).
I guess my AIBU to think you can't just ambush people for gift aid without knowing if 1) they pay tax and 2) you need to explain the details of it. Which she didn't.