We have lived in our current house for 19yrs in August. For about 15 of those, we got mail addressed to previous owners, regarding some shares registered in Dublin. For years I had no forwarding address, so returned to sender, also rang sender, but they kept coming!
Eventually my neighbour mentioned she had bumped into previous owners, who had moved again, back near here, and they gave neighbour their contact details. So I started re-directing the letters to previous owner, but still they came!! Why on earth didn't they tell share company their new address at this point???
Only when I heard that the husband died, and his mail was still arriving, did I write a nice letter to the widow, and suggest that whilst she was changing the shares into her name, maybe she should change the address too. It must have worked as we not had any of the letters for about 4yrs now.
We have just completed sale of my mums house this week, after her death in Feb. Whilst official mail has stopped, or coming to me/brother, I suspect she may get some xmas cards from people who dont know she died (its hard at 90, they have made many friends and acquaintances but her address book was a mess, and not all had phone numbers). But - I printed a load of labels with my address, and left a nice note for new owners, asking if they could use the labels to re-direct any mail. Thay may not, they may bin them, but at least I have made an effort. And if some do arrive, I can look again into her addrss book, see if I can trace the senders.