When a client is saving a card or buying a product such as a membership, which means they will be billed in the future automatically, Gymcatch may be required to take two steps to complete the transaction. The first is to ask permission to save the card to Stripe, the second is for Stripe to charge the card. In this scenario, there is a chance that the bank will want the customer to authorise the saving of the card. Sometimes when it does this, instead of telling the customer that they are being asked to save the card, it just asks the client to approve a £0 transaction. Understandably, the client might be thinking that something has gone wrong because that isn't the cost of what they are buying but what they are actually doing is approving Gymcatch saving the card or approving the permission to bill the card at a later date (e.g. with a membership).
We will continue to lobby for an improved display to customers but this is outside of our control.
All we can advise is if a client is saving a card or buying a membership in Gymcatch and they receive an authentication requests for £0, that this is actually them approving the saving of the card and they are safe to proceed.