Allied Interstate, Inc.
435 Ford Rd. #800
Minneapolis, MN 55426-1066

Send them a certified letter like the one below.  Keep a record of when it was delivered using the delivery confirmation number.  Then keep track of every time they call after that certified letter was received.  Also, write down the content of the call (what they said, if it was a recorded call, etc.)  You should also hit *57 to activate Call Trace because a lawyer can subpoena those records to prove Allied Interstate called.  The more detailed your records are, the better your chances will be in court.

Dear Allied Interstate, Inc:

On (insert date here), someone (put name if you know it) from your company contacted me about a debt.  I do not believe that I owe this, and I dispute it.  In accordance with Section 809 of the Fair Debt Collection Practices Act, I am asking that you provide me, in writing, the following information:

1.    What the money you say I owe is for
2.    How you calculated this amount in a way I can understand
3.    Show me copies of papers where I agreed to pay what you say I owe
4.    Provide me with a copy of a judgement (if applicable)
5.    Identify the original creditor
6.    Demonstrate that you or your company is licensed in my state, and inform me of the license number.

Please provide this letter to the company for whom you are collecting so that they have notice of my dispute.  Furthermore, please inform any credit reporting agencies to which you’ve reported this debt that it is being disputed. I demand proof that you have done so.

Finally, cease and desist from contacting me in this and any matter, except via United States Mail.

Sincerely,

Your name here