Direct billing an order is used to invoice an order that is assigned to a customer that has an account with you. the Term direct Billing simply means "Directly Bill a Company for an order or Send an Invoice for an order to a company"

Setting up Direct Billing at order entry time will ensure the order will automatically be invoiced when the order is marked complete.

To direct bill an order click on Direct Billing in the Additional Order Options/Actions portion of the screen:

When you click on direct bill the Direct Billing Details window will open allowing you to select the customer you wish to bill.

In the direct billing details window, you double click the yellow box to open up the Select a Customer and Contact window, or click on reset to COD to change back to a counter sales order on an order that is setup to direct bill already.

Now you can select the customer from your customer database and the authorized buyer for this order. Check mark the Direct Bill to Customer block and click done.  If you check mark the Default from customer, it will overwrite the demographic information of the order. Now when the order is complete, it will create an invoice for the order to the customer automatically.