If you receive a reservation from Booking.com and it has no credit card information, this is because of a setting within the Booking.com extranet.

If you wish to disable this feature, please login to your Booking.com extranet and you will be able to edit this under the Payment and Cancellation Policies under the ‘Property Info’ tab.

Simply un-check the box that states 'Allow domestic customers to book without credit card details'.

When this is done, reservations will only be allowed with credit card information.