CommerceHub receives a Purchase Order Transaction Set (850) on your behalf. When our Run Connectors process or job is run, we write this into your ERP as an order. Eventually, this order will be invoiced, shipped, and posted at which point, the Run Connectors process/job is run again. At this point, we then tell CommerceHub that their purchase order has been invoiced so that they can send ship notices (856) and invoices (810) on your behalf as needed or configured.