Once you receive the validation information or notice from the debt collector during or after your initial communication with them, you have 30 days to dispute all or part of the debt, if you don’t believe that you owe it. If you receive a validation notice, the end date of the 30-day period will be specified.
Once you’ve disputed the debt, the collector can’t call or contact you to collect the debt until they’ve responded with verification of the debt.
You can also request that the debt collector give you the name and address of the original creditor, if different from the current creditor. If you make that request in writing within 30 days, the debt collector has to stop all debt collection activities until it provides you that information.