I just verified my Chase (Hyatt branded) Visa card and then had no problem booking Renfe tickets, where prior to verifying, the card wouldn't work.
Did this by going to visa.com
edit: too soon with the jubilation. First purchase went through, but have been trying unsuccessfully for an hour to purchase the second leg.
Last edited by rittenhousesq; Jul 4, 2011 at 10:12 am
Reason: added and update