Interesting thread, I actually was going to start a similar one myself.
Don't mean to hijack, OP and sorry if anyone things I'm cheeky for asking, but advice would be good.
I have been trying to faze out and cut contact with a relation, not my parents. This person doesn't send presents to my DC but sometimes sends birthday or Easter cards with £ in them.
Really I want nothing to do with her and don't need her money as even seeing her cards makes me ill.
Up until now I've just accepted the £ and the cards, but usually I stick the £ in a charity collection or give it away.
A few weeks ago she sent me a letter basically saying I was horrible to old people, taking her money (even though she fecking sent it to my DC!!!) and how she doesn't have much money left blah blah blah. This letter was not replied to by me and I haven't physically seen her in over a year.
DS birthday is coming up soon and I dread the idea that she will send a card with £ in it. Do I send it back unopened? Do I keep the card but return the money? Do I accept it and say nothing?
It's all manipulation and I know it. She knows I have my own life and want to keep my DC away from her (she hasn't seen DS since he was a small baby) but still she keeps twisting.
Sorry again for hijack, but I thought my situation had some similarities to the OP's.