Specifically, the rule states that a debt collector cannot: Make more than seven calls within a seven-day period to a consumer regarding a specific debt. Call a consumer within seven days after having a telephone conversation about that debt.
A 623 dispute letter is a written communication submitted to a credit bureau, typically by a consumer, to dispute inaccuracies or discrepancies in their credit report.
Dear Creditor: Please provide me with verification of the debt which you state I owe. Please provide me with any records which are in your possession, including, but not limited to, all statements of each account, invoices, and any other documentation which I may have signed.
Despite the misleading name, 609 is not exactly a dispute; rather, it's a letter/document requesting that the credit bureaus give you information regarding the accuracy of your credit report.
While email may be easy, it's not recommended if you need to send a debt validation letter. Instead, send the letter via certified mail with a return receipt so you have proof the creditor received the letter. Or, you can fax it, as long as you keep a copy of the confirmation receipt for your records.
Federal law requires collection agencies to provide debt validation notices, so you don't need to request one. In some cases, a collector may provide the validation letter as its initial communication to you. If not, they must provide it within five days of their first communication, either in the mail or via email.