Once last year I boarded #92 in RGH. When no one came to collect tickets, I went to the dining car and took my ticket with me. After breakfast, I went back to my seat and took my uncollected ticket with me. The tickets were collected right after RMT, 1.5 hours after boarding in RGH.
Another time I boarded #75 in RGH, which is the originating station. The tickets were collected before we left RGH.