866-245-5264

You will need to send them a certified, return receipt debt validation (by law they have to go back to the original creditor to prove you owe the debt), cease and desist calling, or "not me" letter (this will be the best money that you have ever invested).  Also send it first class mail in case no one will sign for it.  Make a notation of that fact at the bottom of the letter.  You also need to report them to the proper agencies to which I have provided links to.  Then you need to go out and get a consumer lawyer to sue them on a contingency basis (no money out of your pocket) and let them pay you for the harassment.  If everyone did these three things, these crooks would be bankrupt, and we would all be the richer for it.  Use these web sites to find an attorney in your state that will probably take the case on a contingency basis (no money out of your pocket up front):  http://www.consumeradvocates.org/
http://www.consumeradvocates.org/find-an-atto ... tates_value=All

Everything else you need to know follows including at least two or more federal and state agencies where you should report their criminal activities.

ALLTRAN AKA ENTERPRISE RECOVERY SYSTEMS AKA ERS AKA UNITED RECOVERY SYSTEMS (URS) AKA PLAZA RECOVERY AKA ARRAY SERVICES GROUP AKA AUDAX PRIVATE EQUITY AKA J. C. CHRISTENSEN & ASSOCIATES AKA CARECALL AKA PROSOURCE
Alternate Business Names
ERS, Inc., ERS, ERS Call Center Solutions

Web site with no physical address listed in their contact info:  http://alltran.com/contact/form/?form=consumer

BBB gives them a no longer accredited A+ listing them as a debt collector at the Illinois address with 15 complaints (BBB removed 29 complaints) and 6 negative reviews and 1 positive revies as of 2/21/2021:  http://www.bbb.org/chicago/business-reviews/c ... ook-il-14008895

Bloomberg gives the names of the head criminals in this organization:  http://www.bloomberg.com/research/stocks/priv ... ivcapId=4593383
Looks like their LinkedIn page has pictures of the criminals who call and try to collect bogus debts from you:  https://www.linkedin.com/company/enterprise-recovery-systems-inc
https://www.linkedin.com/company/array-services-group
Illinois Dept. of State info:
Entity Name    ENTERPRISE RECOVERY SYSTEMS, INC.     File Number    55177961
Status    NOT GOOD STANDING
Entity Type    CORPORATION     Type of Corp    DOMESTIC BCA
Incorporation Date (Domestic)    08/03/1988     State    ILLINOIS
Agent Name    SCOTT J NICHOLSON     Agent Change Date    05/27/2015
Agent Street Address    840 S FRONTAGE RD     President Name & Address    SCOTT NICHOLSON 2000 YORK RD/#114 OAKBROOK, IL 60523
Agent City    WOODRIDGE     Secretary Name & Address    STEVEN F RECCHIA SAME
Agent Zip    60517     Duration Date    PERPETUAL
Annual Report Filing Date    00/00/0000     For Year    2015
Old Corp Name    12/27/1988 - MID-AMERICA COLLECTIONS INC.

Looks like they have very few happy employees:
http://www.glassdoor.com/Reviews/Enterprise-R ... ews-E367333.htm
Dept. of Education contract:
https://studentaid.ed.gov/sa/sites/default/fi ... verySystems.pdf
Other complaints:
http://www.complaintsboard.com/complaints/enterprise-recovery-systems-inc-oak-brook-illinois-c283908.html
http://www.complaintsboard.com/complaints/enterprise-recovery-systems-inc-oak-brook-illinois-c283908.html
http://www.complaintsboard.com/?search=enterprise+recovery+systems

This web site lists some of the head criminals at this organization:  http://www.corporationwiki.com/Texas/Houston/urs-management-llc/36562394.aspx

Complaints with listed cases against this bunch of criminals: http://www.creditreportproblems.com/United_Recovery_Systems.htm
http://law.justia.com/cases/federal/district- ... 4687/403287/24/

Other complaints:
http://www.consumeraffairs.com/debt/united_recovery.html
http://www.ripoffreport.com/r/united-recovery-systems-lp/houston-texas-77072/united-recovery-systems-lp-scum-bottom-feeder-collection-agency-with-law-breaking-track-re-323800
http://www.complaintsboard.com/complaints/united-recovery-systems-c14170.html
Longtime criminal employed there:  https://www.linkedin.com/pub/margaret-docherty/50/968/1b1
Looks like every employee review is negative:  https://www.glassdoor.com/Reviews/Array-Servi ... 21,29_IM820.htm
https://whocallsme.com/Phone-Number.aspx/8552556455

Looks like they get sued a lot:
http://law.justia.com/cases/federal/district- ... 4687/403287/24/
http://www.law360.com/cases/5318f7b3bad7c6367600ad07
http://www.gsgfirm.com/pinson-v-united-recovery-systems-l-p/
http://law.justia.com/cases/federal/district- ... 01391/86083/18/
https://www.gpo.gov/fdsys/pkg/USCOURTS-insd-1_14-cv-00657/content-detail.html

It is incumbent upon them under the law to prove that the debt exists and that you owe it, and (this is the important part) that they have the legal right to collect it.  You are not obligated under the law to prove that you don’t owe or that it is paid.  

Federal law (FDCPA) requires them to send you a letter (US MAIL ONLY) postmarked within 5 days of their first contact that contains their name, physical address, the creditor’s name, and the amount of the alleged debt. It also must contains “mini-Miranda” telling you that it is an attempt to collect a debt and that all information will be used for those purposes.  The one other important thing that this letter must also have in it is that you have a right to dispute the debt within 30 days of receipt of the letter and if you do so, all collection activity must be stopped until the debt is verified.  If and when you get that letter you should immediately send that debt validation letter by certified, return receipt mail.

First, you should make a complaint at this Federal Agency, and while there you should also read up on how debt collection is supposed to work as well as what your rights in this matter are: https://www.consumerfinance.gov/

Also file complaints with the FTC: https://www.ftccomplaintassistant.gov/#crnt&panel1-1

Also file a complaint with your State Attorney General's office.
List of State AG’s offices:   https://800notes.com/faq/attorney-general

Per Res47
A stray comment and an educated guess lead to J.C. Christensen & Associates in Sartell, MN. Cribbing my own notes from a few years back:

JCC is a subsidiary of Array Services Group. JCC is itself one of the many tendrils of giant mutant debt buyer squid Sherman/LVNV Funding, a chronic lawbreaker. JCC has attracted many lawsuits and complaints of vile behavior. Various sources tell parallel stories of reckless skip tracing, obnoxious and cursing reps, illegal threats, repeated calls for intentional annoyance, seeking payment for debts long out of statute, and unjust collection from families of the deceased.