Are electronically transmitted accountable document transactions, not represented by hard copy documentation, adequately controlled to ensure that transactions are recorded on a timely basis? (FM 89-80-10) Reason: For example, where the billing of customers is by means of an EDI arrangement, the serial number assigned to the Advance Shipping Notice, or other such form, is to be the serial number assigned to the invoice for billing purposes. Control of the electronic invoice serial number assignment would, therefore, ensure that (1) All shipments are billed, or approved as no-charge items; (2) Shipments are billed on a timely basis; (3) All charge billings are recorded to customers? accounts receivable; (4) Control over no-charge transactions is established.