There seems to be some inconstancy as to when Supplier Payment Notification Emails are offered as an option when paying single Supplier Invoices and no option at all when paying multiple Invoices for the same supplier.
From a supplier screen click on an outstanding Invoice from the recent purchases , click log payment and this
option is displayed “Send an email notification to the supplier”
From the supplier screen click Outstanding , tick the same invoice , click Update as paid here no option to “Send an email notification to the supplier” is given.
So can when add the “Send an email notification to the supplier” when clicking Update as paid that works with single and multiple Invoices.
The way I get around this at present is Update as paid multiple Invoices - print out the payment and email to the supplier which is very long winded.