After switching phones from a major phone carrier, within 30 days of cancellation of the account, the carrier placed a collection on my credit. As soon as I discovered, I sent a debt validation letter. The CA responded to the letter providing statements, but did not comply with all of my requests. I fired off a second letter stating that they had failed to properly validate the debt. Well, they removed it and I thought the bogus debt was officially history. In the mean time I bought a car, all was great. Recently, I discovered that the same carrier hired a second, different CA and again placed the collection account on my Experian report. My instinct here is to send them the prior DV letters and response and demand they remove, but I think there are some serious violations of the law here and wanted to hear what you all thought. Thank you in advance.