1. If the patron paid in cash or check, either recollect that money or keep the money and ring up a new order for that money.
  2. If the patron paid in credit card, get the patron's credit card information again and ring up a new order to charge the credit card.
  3. If a group sale was refunded and the group is not checked in yet, add a new payment to the sale for the amount refunded, using the proper payment method.
  4. If a group sale was refunded and the group is checked in, add a payment up to the amount due on the group sale.  After check in, you cannot add payments greater than the amount due.
If you'd like to see the ability to edit refunds added to Altru in the future, please vote for our Altru Community Idea: https://altru.ideas.aha.io/ideas/ALTRU-I-355