Final answer:
To adjust the payment on the customer's ticket without swiping their card again, you can either void the transaction and have the customer pay again, or refund the difference to the customer's credit card.
Step-by-step explanation:
If a customer pays with a credit card in West and makes a comment on their receipt after signing, there are a few options to adjust the payment on their ticket without swiping their card again.
One option is to void the transaction and have the customer pay again. This would require cancelling the original payment and processing a new transaction.
Another option is to refund the difference to the customer's credit card. This would involve issuing a partial refund for the amount that needs to be adjusted.