Generate invoice only when order is paid

Hi,

I have problem – we have only credit card payment, so when someone is ordering, can paid or not. But invoices are generating for every order (also when unpaid order).

So we have for exmaple 10 invoices (2017101,102,103,…), but only 7 of them are paid, and other 3 are not paid and would not be paid. So we have 3 invoices we do not need.

So what we want :

1) Generate invoice only when order is “Finished”
2) Send invoice only when order is “Finished” (already done).

What we do not want :

1) Generate invoice for every order that comes to shop
2) Gererate invoice to unfinishet (unpaid) orders.

How to done that ?

Thanks for your advice