I believe when putting in the address & phones numbers and probably other personal info, if it is not belonging to the person who bought it, it won't work... I'm not sure, but I think that may be how it works.
ILL USE CAPS FOR THIS. IF IT IS A VISA VANILLA CARD, REGISTER IT ONLINE WITH THE INSTRUCTIONS. WAIT AN HOUR OR SO AFTER THAT AND YOU CAN USE IT ONLINE, IF YOU SPAM TRYING TO USE IT YOU'LL REGRET IT.