All orders need to check-in before night audit. Hotel has to check-out in the same day if guest check-in after night audit.

For example

Order: 3^rd Jan – 5^th Jan

Guest check-in at 5am in 4^th Jan, then hotel needs to check-out in 4^th Jan. Then adding new order in PMS for an extension.

If hotel forgot to check out the room in 4^th Jan, you will find there are only 1 night accounted in system in 5^th Jan. Then you need to add another order for guest.