My father recently got a letter from a law office. What it wanted to convey was "we saw you sent a bank transfer to Bob lately..." (this was not stated implicit

My father recently got a letter from a law office. What it wanted to convey was "we saw you sent a bank transfer to Bob lately..." (this was not stated implicitly but it's the only way how they could get address to send the letter) - "FYI Bob owes us 10k, please don't send him any money anymore, instead send it to us directly; or if you send to his account we'll take it anyway" (now that I'm thinking about it, this could be a nice scam tactic, but I'm pretty sure that one was legit). Anyway, the letter was written in such lingo that on first reading it was as if my father owed Bob 10k. Some elderly person receiving such letter could have had a stroke.