Yes, you can use our approval tool which enables you to take initial bookings without payment, then approve each order individually at a later date which will send a registration page link through.
1. Please switch on "Enable if the registration must be approved before payments" in the Publish Options tab of the event setup.
2. Within the event's registration list, you can click on the order ID of the order you wish to approve.
Once the approval notification has been sent, the colour of the order will change to orange. Once it has been paid, it will change to green.