But the sequel: a few years later I get a bill from a hospital for copay for delivery/childbirth. I call to contest ... we did not even live there any more, did at some point of time but years apart ... but they are adamant that my wife gave birth, at that hospital, on that date, in that city, and maybe she never informed me :) it was almost that weird. I don't act on it and give them a statement that it is not me/my family. Then another bill (or a final notice) a couple of years later. And then finally something clicks ... I used to work in a team where when I moved out, someone replaced me and his name was also same as me. Reach out to him, and his wife's name is same as mine, and they lived in the same city we lived in.
So someone somewhere fat fingered the wrong account when searching by name. He acknowledged the account (and childbirth) and paid up. I unfortunately did not ask him about his wife's date of birth to solve the immigration mystery.
My suspicion has been at my past employer's HR or legal department mixing up files