Navigate to the invoice you wish to refund. (You can access the invoice in Stora and select view on Stripe)

Click on the drop down menu under and select Issue a credit note from the drop down menu.

Then on the invoice, alter the amount to be refunded if necessary and select the card from the the drop down field titled select how to credit. When happy with details select Issue credit note to confirm.

Please advise your customer that it can take up to 10 working days for a refunded payment to appear in their bank account.