Simply send your invoices to the debtor finance firm. The debtor finance firm will provide an agreed-on percentage cash advance of the invoices to your business, usually 80%, generally within 24 hours of confirmation of the invoices being received. Your customers pay the money owed on the invoices directly to the debtor finance firm. Once your customer’s invoice payments are received, the debtor invoice firm provides your business with the remaining invoice balance, known as a rebate, less any fees for the finance service offered.