I read many complaints about this Afni Collection. Like most of the complaints posted, they said I owe T-mobile $297.89 but they will settle for $100. They want me to send the check to them. They even don't have a T-mobile account (if I DO OWE T-mobile). I did not call their number but I called T-Mobile instead. T-mobile check their record and stated that I DO NOT have any balance or OWE anything.
Please beware of this kind of scam and harrassment.
I will report them to the US Post office.

I will list a complaint, but respectively wish not to include name and number. Sorry, you can't trust things nowadays.
Heres another complaint against Afni. Same letter Same old bill from 11 years ago, from verizon formally GTE. now heres the kicker they claim it was an old cell bill, but funny thing is the number they refer to on the bill goes to a residence in a State that I do not live in. If you want to have some fun. Call this company, they have some of the most friendly Satanic devil worshipers to answer the phone, ask them how they got your address to send the letter (don't give them any info to verify anything) and ask them how you could possibly have a cell phone bill when you are Amish and have never had any electronic devices nor believe in them, and if they become rude or obnoxious, just calmly ask them to gather the appropriate information to resolve the matter and when they get this together, to give you a call at the phone number they have listed on the letter. Have fun!