On 18/09/2014 07:44, Roland Perry wrote:
[...]
It is indeed "apparently simple" About two lines of code could apply
such a discount to a suitably registered contactless account.

You'd need a solid system in place to verify that the payment card
holder really did hold a Railcard.

Then you'd need a solid system in place for RPIs and the like to be
informed that they should also checking for a valid Railcard.

Bit more than two lines of code there.

Actually, all that stuff is already needed for Oyster loaded with a
Railcard.

One significant difference is that the Railcard discount flag is
actually stored on the Oyster card - that's not possible with CPCs (just
possibly might be with a future generation of them).

RPIs do ask to see associated Railcards.