Originally Posted by
chrissxb
if get caught (not very likely to happen) apologize and ask to pay for that italy part.
There should be no need for that; the Italian segment is almost certainly covered.
The Rail Europe multi-country pass benefit summary for passes including Switzerland shows that as of 2004 your train, the "Centovalli Express" is covered:
http://www.railtickets.com.au/downlo...enicTrains.pdf
If that doesn't convince the conductor, show him SBB's map of trains covered by the Swiss Pass (even though multi-country passes aren't discussed):
http://mct.sbb.ch/mct/en/general-abo...ichtskarte.pdf
Have a great trip!