...
If a new payment method is assigned to a scheduled payment, the failure count will reset
Ex: CC Failure Week 1, Week 2, Week 3, New Payment Method Added = Failure Count Resets to 0
Insufficient Funds (NSF)
If a single invoice has two NSFs, the payment method will be unscheduled
Ex: Invoice 1234 has NSF on Payment Date 1, Invoice 1234 has NSF on Payment Date 2 = Payment Method Unscheduled.