Short story: I need help writing a debt validation letter to a debt collector for a Tmobile account that should have been cancelled. More Details: A few years ago, I moved out of the country. I called Tmobile to cancel my cellphone before moving. There seems to have been a miscommunication and the phone line was not canceled. I had already left the country so I didn't receive any bills, etc. I recently checked my credit report and found a collection from Midland Funding on behalf of Tmobile. I called Tmobile to figure out what the collection was. They had notes of my requested cancellation but the representative-- for some reason-- never canceled the account. After 2 hours and numerous transfers, I was given a physical address for Tmobile customer service. I sent a letter explaining the situation. Last week, I received a response telling me to contact Midland Funding... Sigh. I *have* tried calling Midland Funding. They told me if I send them proof that I've paid the account, they'll cancel the debt. Clearly, I don't have this and no matter how I tried explaining it, the collections agent didn't understand the situation. I believe my next step is to send Midland Funding a debt validation letter. But I'm concerned their response will be to just send me phone bills-- even though there was no usage of the phone line. I'm wondering if their is a specific type of validation letter I can use to best resolve this? Or any particular language to include in the letter? Thank you for any input!!