Collection Process Account Placement and Acknowledgement Upon receipt of your account(s), we will enter the claim information into our database and send you an acknowledgement of same. Dunning Notices and Claims Assignments Immediately after registering your claim(s) into our computer system, we will send to each of your business debtors an initial dunning letter requesting payment in full. Concurrent  with the mailing of this notice we will assign the claim to one of our professional collectors who will make his/her initial call to your past due customer within 24 hours. Tracking Corporate Debtors A company may try to hide from a creditor by changing phone numbers or addresses, or by switching the name of a business. At National Commercial we don’t stop looking until we have exausted every effort to discover the debtor's whereabouts so we can begin our recovery work.