It’s essentially a wide net fishing expedition. Let’s say the debt is real, but also really old and potentially non-collectible. Let’s say there are a thousand people just like you in the same circumstance. If only 100 people actually pay the $100, Then they have made $10,000 on the investment of 1000 postage stamps and letters.................
Yep, that’s why the vanity, to warn others. Like I said, I can’t say if the debt is real(outstanding or closed), and I have no records (canceled checks) to prove otherwise, and the SoL has run out.