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Re: How do I add the credit card processing fee to an invoice without being charged the processing fee for the base amount AND the processing fee?

The issue I am finding with even calculating the fee and adding it as a line item on the invoice is that you need to know before making the invoice how that customer is going to pay.  I find some customers usually pay with check, but because the option is on the invoice, they sometimes pay via credit card.  So I cannot determine ahead of time exactly how the customer is going to pay.  What would be so great would be if we send the invoice as normal, but when a customer pays via credit card, have the payment page add the fee at that time, then take your fee amount and pay us the invoice amount.  Simple and headache free!