twilio messaging

[Manos-GR]

hello, i have a problem and i request your help.
When the client has 10euro on his account and an invoice is created with amount 10euro the system send SMS with account balance 0 to the client , or for example the client has payed 100 euro for 10 months. how to avoid sending SMS to the client? i want the system to send only negative balance SMS. is a waste of money sending SMS when the client has already balance. Thank you!!!

[Manos-GR]

i only have text on invoice.add_draft , invoice.overdue, payment.add