Once you have received your product, sooner or later you should receive a bill. This is often called a supplier or vendor invoice. It is of course possible to receive a bill before you receive products. Each business will have to decide the exact workflow for when they pay bills, and under what conditions.
To create a vendor bill, go to the Invoicing menu and select Purchases | Documents | Vendor Bills:
Click Create to bring up the Vendor Bills form.
In the workflow, the user should now have received the vendor bill either electronically, by mail, or in another form that they need to pay. Use the Vendor drop-down ...