The saving of card details for use on future transactions was created in 2019 by introducing Strong Customer Authentication rules for increased online payment security.
It is still possible for your bookers to save their card details for future bookings, but the process has changed for those using Stripe as a payment gateway.
Since introducing the SCA regulations, your bookers can save their card details via Stripe checkout, providing they've set a Bookwhen password. Bookers can save their card details at the point of entry -
Bookers can save multiple cards to their accounts. Each saved card will be available for selection at checkout if logged in. They can also remove saved cards by selecting the red bin icon. -
Please note - as Bookwhen gives the option to create a password only after completing an initial booking, the earliest new customers will be able to save their card details is on their 2nd booking.