This is probably the most visible impression a customer will see of their invoices sent from QF - the subject field in the email.
I wanted to set a custom description of the invoice in the sent email subject field so the recipient would better recognise the email and be able to lookup the invoice using the normal email filtering to find it.
This facility is not included in the Invoice_Send Schema so I resorted to the Invoice_Create Schema
“<InvoiceDescription>Your Phone Bill to ‘.$cdr_dates.’</InvoiceDescription>”
However, this field is only as the invoice description if the recipient is another QF account. So its a bit limiting as only 2 of my customer are QF accounts.
I would suggest adding a field to the Invoice_Send Schema to set the subject - unless I have overlooked a setting somewhere else ?
PS: Great API !