In message , Lawrence Myers
writes
The Literature was very clear. If you want your Oyster purely for prepay,
then no registration is necessary, so no photocard. However, if your using
for 7 day or longer travelcards, then you have to register and so a
photocard is a must.

But not for adult rate 7 Day Zone 1 or 2 or Zones 1&2 Travelcards
whether on Oyster or not.
--
Kat Me, Ambivalent? Well, yes and no.