Mark Invoice to be paid by credit card (which appends Gateway fee to invoice)

Hi there,

I have some customers that will always payment with a credit card (off-line). We add on a percentage to customers invoices for this convenience. Currently when we create an invoice, the customer must log in to their panel and pretend to make an online credit card payment so that the fee is added to the invoice. They then back out of the online payment and then call our office to provide their credit card details.

We would like to see the ability so that the billing person can apply the fee before the invoice is set to the customer.

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