As explaind by Toric, I just wrote it in English.
create shipping for Cash on delivery, add the payment COD to this shipping method.
So now you can add the fee to the shipping cost for COD, this should be safe.
As explaind by Toric, I just wrote it in English.
create shipping for Cash on delivery, add the payment COD to this shipping method.
So now you can add the fee to the shipping cost for COD, this should be safe.