For her whole life, my grandma would receive any mail sent to her full name and zip code. Since it was a small town and everyone at the post office knew her.
My wife grew up in a small town. I met her in university and before the summer break I asked for her address to write to her (this was in the 90s and although I had email by then, she didn't). She assured me that her first name and the town was enough, since all the mail for the town went to the shop across the road from her house and everyone knew her.
