The Purchase Invoicing module provides the facility to create and maintain purchase invoices and credit notes for Suppliers. This section is controlled by security which is maintained at Settings > Security > System Security > Financial > Purchase Ledger > Purchase Invoice
The 'Type' option on the Purchase Invoice is used to indicate if an invoice is a Purchase Invoice or Credit Note
The Supplier Purchase invoice also has the ability to recover a WiP Expenses within Purchase360 Module. This then creates the relevant wip journal transaction in the WiP Module
The ability to Settle a Purchase Invoice is also available on the Purchase Invoice grid using the RCM > Settlement.
Further details about Settlements available at the Settlement section.