ok, first off, the statute of limitations in TX is 4 years across the board, so unless you've made a payment on this account within the last 4 years, this debt is past the SOL. This means that their threat to sue you is an empty one--but only if you use the expired SOL. If you dont bring it up, neither will the judge if they sue you, and the court will allow the suit to proceed. What you need to do in this case is simply tell them to get bent, because this seems really fishy to me. I have never heard of the OC buying an old debt back like that, sounds to me like someone's error or some scam. I would tell them to go ahead and sue you if thats what they feel they should do, and when they do, you'll just use 'expired statute of limitations' as your affirmative defense, and the judge will send them packing. Tell them all of that. There is nothing that will counter the SOL defense, as long as the SOL really has expired. They cannot get around it. They also cannot restart the clock on reporting it on your credit bureaus. Then, send them a certified letter--a cease and desist order. That basically is you telling them that they are no longer allowed to contact you in any manner regarding this matter. By law they have to abide by it or they can get sued by you for breaking it.