When you pay with a card and opt in to "Save this card", we store a secure token from Paystack (not your full card number) so you can use the card again. Saving happens after you complete a successful payment. Paystack may place a small temporary charge (e.g. R1) to verify the card and then reverse it—this is normal and you may see it on your statement.
We never store your full card number or CVV. The token lets us ask Paystack to charge the card for future bookings when you choose that payment method. You can remove a saved card or set a different default anytime in account settings under Payments.