A guest's pass can be made temporarily inactive by hotlisting their access on their account. This will alert agents as well as ticket checkers/lift attendants that the pass they have is not able to be used and they will need to follow up with an agent about the issue.
You will most commonly see hotlists that require a relatively easy fix such as "Liability Release Required" meaning the guest has not signed their waiver or "Inactive Pass", meaning the guest has an old pass media with them. However, if you encounter a hotlist that seems like it may be a large issue, look into why the pass may not be working first and then contact a supervisor or manager if you are unable to alleviate the situation.
When hotlisting, set the effective date as the start date the guest will not be able to use their ticket. The expiration date should be set as the last day the ticket will not be able to be used. If it is a one-day hotlist set the effective and expiration date as the same day, so the ticket will be unavailable for use on that day only.