UK Switch

[Jon Ribbens]

Philip Rowlands <phr@doc.ic.ac.uk> wrote:
> Therefore, when fraud or card loss occurs, they can't create a new card
> number, only a new issue number. Without it, the transaction is
> probably refused. The issue numbers are, in my experience, both highly
> predictable and sequential.

And, in my experience, transactions can go through with an issue
number of "0" (when this is obviously not a valid issue number).