You can require your clients to provide their billing information (credit card details) at the time of booking for services, packages, and programs.
Billing information can be collected even if you do not require immediate payment for your service.
1) Go to My Practice > My Services
2) Click Edit on the service or package you wish to collect billing information for
3) On the Edit Service or Edit Package page, click on the Advanced Options tab:
4) Check the "Require billing information when clients book this service/package" checkbox:
5) Click Save Changes to save details for the service or package
On your Bookings Page, clients will be prompted to enter their credit card and billing information as follows: