The Account / Debt Was Sold From The Original Creditor to A Debt Collector - What Now
When one has begun sending the Debt Removal Secret's 'verification & validation' letters and the original creditor immediately sells the debt to a debt collector, it is best to restart the process with the debt collector. Technically, when an original creditor [or debt collector] sells a debt they are required by law to attach any 'disputation records' with it, and therefore one could continue sending the next letter(s) in queue to the debt collector.
NOTE: When debts are sold debt collector to debt collector, simply continue sending the next letter in queue to the new debt collector.