paperwork

The person who called you is from a company that has been a topic on this board in several threads. Since they stated that they sent an e-mail to your old work I question the legitimacy of any debt they say that you owe. Anyone who has a legitimate debt will not bother to tell you that they are going to serve you, they just will. This company (I think it is CRS and associates) will use threats and harassment to attempt to strong arm you into paying an illegal debt or on something that was paid off long ago.

There is a thread entitled CRS that will have more information about what is happening to you and how to deal with it.

If you can get an address for this company, send a C&D letter. You should also file a complaint against them with the FTC as any debt you may "owe" is illegal.

Payday Yes is an illegal lender. You can either send the C&D letter to the collectors via CMRRR or you can just ignore the calls (better yet, pick up the phone and blow an air horn into it).

You should file the AG and the FTC complaints though.

FYI - CMRRR is certified mail, return receipt requested. A lot of illegal lenders use dropboxes and fake addresses to keep operating. Chances are if you have a physical address it probably doesn't get checked often enough to matter so be sure you email and/or fax your letters as well so you have some further traceability in your communications with them. People claiming to be process servers or that they are sending process servers are full of it. They want you scared and willing to pay more than you owe.