They likely will use the info, since these items are usually collected at the time you establish an account. If the debt is yours, then it's yours. There's not much percentage in trying to endlessly dispute it...in fact, such action might get you flagged and make it more difficult for you sometime down the road to dispute a future account that really ISN'T yours (in short, you'll get a reputation as The Boy Who Cried Wolf).
Now I am in the process of disputing all entires on my CRs that do not list the date of original delinquency, the balance, and the creditor. I think this is fair--how am I supposed to know an entry whose only information is "NCO FINANCIAL/22" (no balance, no account number, no original creditor, no date of first delinquency, no nothing) isn't fraudulent?
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in a credit-scoring postnuclear Stone Age...