Payment Declines can happen for a variety of reasons. You will notice a customer's card was declined upon confirmation of reservation request. The reservation will show as confirmed but the payment will be flagged and marked as unpaid.
The boater will receive notification that their reservation has been confirmed, but their credit card was declined. They will be asked to check for fraud alerts and/or add a new card to their Dockwa account. Upon adding a new card, the system will automatically retry the failed charges and will update the reservation to paid once the card is confirmed.
Related Article: Why was a Customer's Charge Declined?