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Paul Corfield · June 28th 08, 10:42 PM posted to uk.transport.london

On Sat, 28 Jun 2008 20:24:17 GMT, (Neil
Williams) wrote:

On Sat, 28 Jun 2008 17:57:22 +0100, Paul Corfield
wrote:

TfL are switching over the ticket issuing equipment to one which deals
with Oyster but cannot print tickets. For those ticket products which
would ordinarily be printed TfL are now using pre-encoded ticket stock
which the agent has to date stamp.

Very Dutch. But if they're pre-encoded isn't that an opportunity for
someone to use one through automatic barriers on multiple days? Or
are they given different dates on sale or return, or perhaps do they
encode themselves on first use?

Your final option - updated coding on first entry - is correct. All
tickets and smartcards are updated whenever there is a valid transaction
at a ticket vending or validation device.
--
Paul C

Admits to working for London Underground!