USING THE AR INVOICE IN SAP BUSINESS ONE

I will be posting some job aids designed by me on some scenarios in SAP Business One, I want to start with the AR Invoice.

The AR invoice is the primary and mandatory sales document in the sales process. AR invoice proves that sales has been made to a customer, but not prove that money as been received from the customer. Until incoming payment is done for the customer, the invoice remains open.
The AR invoice is reversed or cancelled with the AR credit memo.

There are two scenarios , when the AR invoice is based on existing document (eg delivery, or sales order) or when it has no base document

Scenario 1: Invoice has no base document