On numerous occasions I have taken donations of clothes or bric a brac into charity shops and been told "put it there love" or greeted with "oh", or "donation is it?"
I don't want them to fall on my neck, but just a smile and a "thank you" would go down well.
Once in the Salvation Army when I had donated some children's books (in good condition) the assistant said loudly, before I left the shop "I hate it when they bring in books, don't you?".
I've got a blacklist now!
On the other hand I went to an Oxfam in Hull and the man was really nice and even got the items out of my car for me. I'll go there again.
I know a lot of them are volunteers, but is it too much to expect?