If the user made an Overpayment by Credit Card on Invoice -> Refund will be “Credit” type, not Check.
To check this, the user needs to do the next steps:
- Create SO -> Add customer;
- Add item with Amount = 100$ -> Save & Process;
- Create Invoice -> Add Payment by Credit Card = 150$ -> Save;
- Reopen Invoice -> Open Payment -> Click on Refund.