Use the Periodic invoices form to define the periods you want to invoice for each order. You specify when the periodic invoice can be created for a period, and you define the sum to be invoiced for this period. In order to register periodic payments, the sales order must contain at least one sales line and one shipping line. Also, you must already have indicated which of the sales lines of an order qualify for periodic invoicing.
The sum to be invoiced each period could be a fixed sum, or a percentage of the total order sum. The total sum is the sum of the sales line(s) you want to include in the periodic invoicing process. It is not possible to invoice, for example, 10% of sales line 1 and 30% of sales line 2 in one period. You can, however, choose to exclude one or more sales lines of a particular order from periodic invoicing.
The periodic invoices themselves are created with the Create periodic invoices process.