If you have the contributions permission on the group, you will see a refund and regenerate receipt button next to donations or ticket purchases that are eligible for refunds in the donations section of an activist's record.
Click the refund button, then confirm to refund the donation or purchase. The amount will be listed as $0.00 and show up in transaction reports as refunded, and the full amount of the donation or purchase will be refunded to the activist.
Note: It may take a few days for the refund to show up on an activist's credit card statement. In Stripe, you will be charged Stripe's fee on refund, though your activist will see a full refund.
Click the regenerate receipt button to resend the activist a receipt for their donation or ticket purchase.