Claimed was process server.  Has called multiple times.  Reverse lookup and caller ID show "Oil Tanking", in Channelview, TX.  Sounds like a phishing scam.

Caller hung up after I answered.  Don't waste your time answering the phone for this caller.

Probably FBCS calling from Pennsylvania.  They use local numbers to try to trick you into answering.    Scummiest of scum debt collectors that try to scare you into paying them on extremely old un-collectable debt.

Possibly this group:

https://www.fbcs-inc.com/
Federal Bond and Collection Service, FBCS
330 S Warminster Road,
Suite 353,
Hatboro, PA
19040
_____________________
BBB:
THIS BUSINESS IS NOT BBB ACCREDITED.
FBCS, Inc
Phone: (800) 220-2018
Fax: (215) 288-9101
330 S Warminster Rd Ste 353, Hatboro, PA 19040
correspondence@fbcs-inc.com
http://www.fbcs-inc.com
BBB® B Rating
On a scale of A+ to F

This is a new one for me. They called on my cell. Didn't leave a message. Probably low life scum so I'm not going to worry about it.