UK Switch

[Charles Lindsey]

> Date: Wed, 5 Jun 2002 15:48:41 +0100 (BST)
> From: Philip Rowlands <phr@doc.ic.ac.uk>
> To: ukcrypto@chiark.greenend.org.uk
> Subject: Re: UK Switch
> List-Id: UK Cryptography Policy Discussion Group=20
<ukcrypto.chiark.greenend.org.uk>
>=20
> On Wed, 5 Jun 2002, Roland Postle wrote:
>=20
> >They usually ask for the valid-from date and/or the issue number. Not al=
l
> >Switch cards have the issue number, but where they do it seems to be ver=
y
> >important.
>=20
> I think this is because the card number is derived from your account
> details, e.g. <standard prefix>+<sort code>+<account number>+<check
> digit>. That's certainly how it appears for my Natwest card.

No, that's the "Switch Number". The "Card Number" is what people are
supposed to write on the back of your cheques to guarantee them up to
=A350. Don't know whether that is actually recorded in the stripe, and
anyway nobody ever seems to ask for it.

Charles H. Lindsey ---------At Home, doing my own thing--------------------=
----
Tel: +44 161 436 6131 Fax: +44 161 436 6133   Web: http://www.cs.man.ac.uk/=
~chl
Email: chl@clw.cs.man.ac.uk      Snail: 5 Clerewood Ave, CHEADLE, SK8 3JU, =
U.K.
PGP: 2C15F1A9      Fingerprint: 73 6D C2 51 93 A0 01 E7 65 E8 64 7E 14 A4 A=
B A5