--- title: "Overview" slug: "overview-1" updated: 2026-08-10T20:22:13Z published: 2026-08-10T20:22:13Z canonical: "help.idibilling.com/overview-1" --- > ## Documentation Index > Fetch the complete documentation index at: https://help.idibilling.com/llms.txt > Use this file to discover all available pages before exploring further. # Overview A purchase order number, or PON, is associated with an order or an order line item. It may originate from a service provider and have meaning that helps a user understand what the requirements are for that order. Sometimes a PON is input manually into the IDI platform; other times it is entered automatically. A single order can be associated with one or more PONs. There are three types of Purchase Order Numbers: - Facility PON - LNP PON - Directory PON By accessing either the Edit Order dialog or the Edit Order Line Item dialog, you can add, edit or delete a Purchase Order Number. - The Edit Order dialog shows ***all*** PONS associated with an order. - The Edit Order Line Item dialog shows only PONS associated with that line item. Using the Order Search or the Order Line Item Search, you can search for PONs associated with orders or order line items. - The Order Search shows all orders associated with a PON. - The Order Line Item Search shows all line items associated with a PON. > [!NOTE] > Note > > Your permissions must be enabled to perform all PON functions.