Will editing of the payment submission charge the customer again?

Example:  The original submission paid $600.00 with her credit card. After editing, her fee went up to $700.00. Will Braintree charge her the additional $100, or charge her another $700.00 or I should send her a bill of $100.00?

Please let me know. 

thanks.

You could check that on Braintree's side, I'm not sure but it could happen that your user will be charged again. What would be the best way to edit the payment is to refund the previous one and ask your user to purchase again.

If you have any further questions please let us know.

Thank you!