The club wallet refund setting in Nettla allows you to decide that players receive refunds into a club wallet as opposed to the same payment method that they used when making the original purchase.
If this is turned on, and someone paid for a booking by Card, Apple Pay, or Google Pay, and then cancels that booking, they will receive their refund into a club wallet instead of back to their card/bank account.
Note:
Note that this setting significantly affects how players receive refunds. Evaluate this carefully with your business partners before enabling it.