Settlement
Settlement is the EP (electronic payment) process that accepts the customer payment in exchange for merchandise. When settlement occurs, you concurrently accept the electronic payment from the customer, agree to ship the order, and release the invoice.
Period when settlement is attempted
Settlement is attempted when you release the invoice.
About processing multiple invoices against one authorized amount
You can process more than one invoice against an authorization. The application processes settlement on a first-come, first-served based. For example, a customer was authorized for $1000, and three invoices were received. The first invoice, for $600, was paid in full, The second invoice, for $300, was paid in full. The third invoice, received last for $200, is not paid in full. Instead, the application applies the remaining $100 from the authorization, and sends $100 to Accounts Receivable for collection.
If, however, on the order you designate that 100% of the order is paid on the credit card, then the remaining $100 would go through another authorization then settlement process.