A couple of decades ago I got sent some potentially sensitive (not sure how sensitive, I read as little as possible) employment related messages intended for someone with a name very like mine (same forename and middle name, surname differed by two typos, they also had the relevant <surname>.net domain).
I replied politely saying that I wasn't who they thought I was, and that I'd deleted the messages, and the buggers threatened to sue me if I continued to receive any more messages that they sent! This was an American firm, so there was no language barrier involved, though apparently an intelligence gap.
I didn't contact the other person until that threat, but at that point I looked him up and passed on that part of the comms trail with a “just to let you know what sort of idiots and litigious fools you are dealing with…” note.
I replied politely saying that I wasn't who they thought I was, and that I'd deleted the messages, and the buggers threatened to sue me if I continued to receive any more messages that they sent! This was an American firm, so there was no language barrier involved, though apparently an intelligence gap.
I didn't contact the other person until that threat, but at that point I looked him up and passed on that part of the comms trail with a “just to let you know what sort of idiots and litigious fools you are dealing with…” note.