How do I find the Original Creditor Account Number on a Collection Letter?

Not all Collection Letters will list out the Original Creditor's Account Number.  Some may only list a partial number.  If you only have a partial number for the Original Creditor, that is okay - enter what you have for now.  Come back later and update once you have the full account number. 

Below is an example of a Collection Letter showing the Original Creditor Account Number: