On Thu, 06 Sep 2007 23:48:38 GMT, Sarah Brown
wrote:

No, you can't (at least with PAYG - I doubt Oysters with Travelcards
loaded are any different though). Oysters don't work like a prepay
card for buying single tickets - it's more complicated than that. It
functions as a set of prepaid singles up to a point, and then caps the
charge, so all your subsequent journeys that day are free. As a
result, passing it back would be like using the same one-day
travelcard for two people, i.e. fare evasion.

For similar reasons, an Oyster loaded with a travelcard can only be
used by one person. Oysters which are only loaded with prepay value
can be shared, but cannot be used by more than one person at a time.
Presumably they can't be used by more than one person within one day,
but I can't find this stated definitively from a cursory look at the
TfL website

Martin