I have for several years had a card delivered from someone that was , I think, my mum's god daughter. (I only vaguely remember going to her wedding)
The first year,after DM had died, as she had included her address and phone number, I phoned her to say that mum had died. I left a message on her answerphone.
While I was at work, my DDad had a phone call from " someone called "P" who wanted to speak to you" Dad had no idea who she was and apparently had told them that I wasn't interested in buying anything! Rang the number back- answerphone again, so left another message. Heard nothing more so assumed the message had got across.
Each year since, have had a card addressed to my parents, despite leaving more messages, and even sending letters explaining that now both Mr and Mrs C were dead. This year, I decided to return to sender and hope that the message finally gets across!