I've left things on the train twice and have had terrible luck. Both times, I called with a half hour of leaving the items, both times at night, after normal business hours. I've called, and been told "they'd send a note to the stations up the line." When I asked when the note would be sent, they said the next day, after the morning rush (both times were on NEC trains). In both cases for me, the train was still traveling, but there was no way for them to radio to the train to ask the conductor to look. Hope you have more luck than I did.