'
Unless the widows are still there to receive the cards ...
... or someone else old enough to remember the person, well, personally.
Then it might be taken any number of ways, people being people.
Cheers,
/s/ ikeyPikey
Edited to add:
"Fun facts from Canada Post: Do you know who once lived here?"Q/ What if the current resident has mental health issues, and is already is on the lookout for ghosts & unhappy spirits?