On Tue, 8 Nov 2005 22:15:34 +0100, "tim \(moved to sweden\)"
wrote:

What would happen if you refused to be checked? If you told them you just
entered from the surface, and were leaving on another exit?

Well if they'd just seen you pass through the exit gates or you emerged
from
a direction where there were only exit gates then I should imagine they'd
be
disinclined to believe you.

As the machine keep the used tickets, what proof of payment
do they expect you to have?

The barriers at KXStP don't eat the tickets - it's an out-of-station
interchange.

In any case, the barriers can probably be set to return all tickets -
I once noticed my single ticket didn't get swallowed when leaving the
last station before a section of line closed for engineering works,
and assumed this was so that passengers could keep their tickets to
use on the replacement buses.