When are the transport invoices paid by headquarter?

MSF Supply’s date of the invoice is the ETD (Estimated Time of Delivery) of the freight and HQ Finance receives the invoices once a month and pays them. The general rule is 2 days before ETD for Air transport and 10 days after ETD for Sea transport, to be sure all costs are included. Since the goods are invoiced when they are in RTS there can be a significant delay between goods invoice and transport invoice.