The invoice payment method in BANNER is dependent on whether a purchase order (PO) was created or not. Use the REGULAR PAY INVOICES method to process an invoice for payment where a PO was already created and approved. Use the DIRECT PAY INVOICES method when no PO was generated.
Access the Banner FIS (Financial Information System) Guides at
>> https://banweb.pdx.edu/bannerdoc/psu_fis.pdf
There are two ways to use the document you have just opened, which is actually a compilation of several useful guides.
If working with the version of the guide you opened with the above link, search for DIRECT PAY INVOICES or REGULAR PAY INVOICES. The keyboard shortcut to take you to the pop up Find (search) box is Ctrl+F (PC) OR COMMAND +F (MAC). The guide on DIRECT PAY INVOICES begins on the 27th page of the compilation, the guide for REGULAR PAY INVOICES begins at the 64th page.
Alternatively, you can save a copy of the compilation and then open the saved pdf in Adobe Acrobat. Using the bookmark feature you can now browse the table of contents and open the individual guides directly by clicking on the title of the section you are interested in.
Another useful reference document to keep readily available while working with invoices is the listing of: Frequently Used Account Codes