On Sat, 2 Jan 2010 18:40:25 -0800 (PST), MIG wrote:

A FoI request to TfL has revealed some more information about OEPs.

http://www.whatdotheyknow.com/reques...ension_permits

Of interest is a full list of National Rail self-service machines
where PAYG can be added.

The added stations can be used to pick up online purchases and auto-
topup from the 13th January.

Look at this bit

"If the customer completes their journey within the zones covered by
their season ticket, the OEP will remain on their card. If requested,
you must remove the OEP from their Oyster card to make sure they do
not incur an incomplete journey whilst travelling within the zones
covered by their season ticket."

So are they saying that if you get an OEP and then don't travel out of
your zones, you get an incomplete journey?

Only if you don't touch out. You have an "unresolved journey bomb" (a
phrase you yourself coined in post
)
which lingers on your card and goes off if you don't touch out.