Total phishing collection agency. The guy calling does not state name of company and then says this message is for XXXXX, or if you can help me find XXXXX. NO LEGITIMATE agency would handle calls this way. If you happen to get someone on the line, ask them to send paperwork ONLY if they can provide you your correct address DO NOT GIVE IT OUT.
They are fishing for old accounts and trying to collect, they may be criminal.
Dont get suckered and don't be afraid.....these idiots live on the fear they try and create.