I occasionally receive mail addressed to my mother, who not only does not live with me, but has never even been to the state I currently live in. I assumed this

I occasionally receive mail addressed to my mother, who not only does not live with me, but has never even been to the state I currently live in. I assumed this was a chain of horribly mishandled mail forwarding requests the n times I've moved since I last lived with her ~10 years ago. Recently I got one for my brother, who moved out a couple of years before I did.