What might a conductor see that indicates suspected fraud regarding a ticket?

A red or amber bar across the ticket detail screen is an indicator that suggests the possibility of ticket fraud. This visual warning is typically designed to alert conductors to issues that may require further investigation. For example, a red bar might signify that the ticket has been flagged as invalid, tampered, or otherwise problematic, prompting the conductor to take action, such as checking the passenger’s identification or confirming the details with the ticketing system.

This visual cue helps maintain the integrity of ticketing procedures and ensures that appropriate measures are taken to address any anomalies, protecting the revenue and operational efficiency of the rail service.