This thread is useful. I didn't realise you could do it by email, as I had previously been told by the club that to do this, you had to go to the ticket office in person, and have them issue a paper ticket (at the same time as disabling your smart card for the match in question). This used also to incur a small admin charge (similar to the £1.50 if I recall), so apart from the hassle of going to the ticket office, it was a reasonable alternative to handing over your smart card. However, when I did it recently (my partner and i couldn't go to the wolves match) so we wanted to let someone else use the seats), they charged me £5 per seat to issue a paper ticket at the ticket office (and didn't mention the email/print-at-home option). Having gone to the trouble of driving to the Amex on a day off, I paid up reluctantly.
Grrr...
Grrr...