The "Open Invoice By Contact - EN" is a report used in credit class generation. This will restrict the view of invoices based on the invoices that a specific contact is associated with. (These contacts are referred to as "Invoice Contacts.")
***Note: This report is only available for auto generated emails ***
This will ensure that the statement sent out to any invoice contacts. will only contain the invoices that they are a contact for.
To use this report, simply add it to any action code that is sent out via credit class (Must be used in an invoice level action and contain an email template)
The email template is best sent out using "@InvoiceContact" or "@InvoiceContact2" in the place of the "To" field of the email template however, it can be used in conjunction with other system addresses. (Note: You cannot have @InvoiceContact & @InvoiceContact2 on the same email template at this time)