When the delivery of goods or services is complete, the vendor must prepare and submit an original itemized invoice to the department that received the goods or services. All invoices must contain the complete purchase order number or contract number, the ship to address and terms of the order. Without this vital information, the invoice may be returned and payment may be delayed. Payment will be based upon correct invoice total submitted and the notification of receipt by the department. Invoice totals that do not match purchase order totals will cause delay in payment.