A couple was booked for allegedly assaulting a ticket-checking staffer at Mumbai. Mumbai: A ticket-checking staffer at Chhatrapati Shivaji Maharaj Terminus (CSMT) was allegedly assaulted by a couple after he asked them to produce valid travel tickets and verify a claim that the man was a railway employee on Sunday evening. The Government Railway Police (GRP) registered an FIR against both passengers following the incident on October 25.