There are some payment-related placeholders
##PaymentList# @@Payment_DocumentNbr@ @@Payment_Status@ @@Payment_FraudStatus@ @@Payment_Total@ @@Payment_DocumentDate@ @@Payment_PaymentMethod_Number@ @@Payment_PaymentMethod_PaymentSystem@ ##/PaymentList#
that are listed as available for the ARDoc and Order notifications. Using them in the order notifications works correctly, in ARDoc notifications (e.g. invoices) they are not displayed.
The reason of the issue is a bug with id #PBA-22815 ("The payment placeholders are not filled for the AR Document notifications.")
Update PBA to 5.4.17 (as soon as available), 5.5.3 or above, where the bug is fixed.