ticket-inspector

Noun

ticket inspector (plural ticket inspectors)

1. A person who checks that passengers on public transport (such as trains or buses) have valid tickets for their journey and, in some systems, to mark or scan those tickets so they cannot be reused.
   • This was the first long train journey I ever took, and the details remain in my memory as sharply as if they had taken place last week. Hopping on the Circle Line to King's Cross, boarding the compartmentalised train, the kindly ticket inspectors, and every station where the Grimsby express stopped...2021 July 28, Christian Wolmar, “Forgotten by the railways, but ripe for the exploring”, in RAIL, number 936, page 34

   Synonyms:

   conductor, ticket collector