Please note: this only applies to payments made through Stripe
Log into you site as Admin (see Introduction to Udo Admin).
Click on Order on the left hand side: this takes you to all the orders.
Find the order you want to process a refund on. Double Click,
Scroll down to Payments & Refunds (with a plus sign top left).
Click on the plus sign and then click on the Refund button.
The amount will default to the total of the invoice, or you can manually enter the amount you wish to refund for a partial refund.
This gives you a reference number.