Answer:
The answer to your question if you have over 500 accounts that are past due is to purchase an enterprise level software that allows you to report to the credit bureaus using a metro 2 format that the bureaus accept files in. The 500 account minimum is imposed by the credit bureaus and you would need to contact Experian, Trans Union, and/or Equifax; set up an agreement to furnish data with them, and update your accounts on a monthly basis. There are several sets of laws governing the reporting of accounts to the credit bureaus including the Fair and accurate credit transactions act (FACTA) and the Fair Credit Reporting Act (FCRA) that you should be familiar with prior to doing so.