Issue store credit refund for completed sales:
You can only refund an order with store credits if a customer has been added to it.
First, please navigate to Point of Sale >>> Sales history, and locate the sale with the help of the search box, the order fulfilment status and the date range.
Second, you can click on the sale and then the "REFUND" button on the page slid out. Hike will lead you to the page to finish the refund.
Third, click on the green "REFUND" button, which will open the payment page.
Last, you can click on the "STORE CREDIT" button to finish the refund process.

Issue Store credit refund for Partially paid Lay-by, Back-order or On-account sales:Moreover, you can also issue Store credit to the customer when they partially paid for the Lay-by, Back-order, or On-account sales within Hike.
Sometimes a customer makes a deposit payment for the sale and on later date, wants to cancel this sale. Now, as a business owner, if you wish to keep this deposit amount on the customer's account for future use, you can refund this as a store credit.
Here is an example:

When you open this sale, you will find an option to Refund and Discard this sale. You cannot only refund this sale as this is partially paid sale.

Simply select, Store Credit option on the payment refund page.

The store credit will be recorded automatically on the Customer profile.
This functionality would greatly improve your workflow and customer satisfaction by allowing you to efficiently manage refunds while encouraging future purchases.