The presumption is always that a vote is genuine, whether the email address is familiar or not, unless something about it is dodgy. As Wendy says, we prefer not to spell out the red flags, but there are a few. And the policy was always to contact the voter if there were questions about the vote. Most of the time it's something innocent and explainable, but every once in a while, people do try to cheat.
I've never quite understood why. It's not as if we're doing cash prizes or anything.
PJ
