Payments or payment reversals for bookings made in advance are normally sent to POS automatically via the Group Sales Cinema Booking Sync scheduled task. 

Individual booking events

When the booking is opened at POS, the amount outstanding will account for any payments or payment reversals have already been made due to the scheduled task.

Multi-booking events

For multi-booking events, the process of sending payments to POS is slightly more complex. A payment made against an event is automatically distributed between each of the bookings in the event. The payment is distributed between the bookings in proportion to the outstanding value of each booking. Therefore, a booking with a higher outstanding value will receive a larger split of the payment than a booking with a lower outstanding value. However, you can also override the automatic distribution and distribute payments manually, by selecting Edit Booking Payment Distribution on the Event Summary page.

Example