It was a very plausible e-mail that advised me of my win in the on-line National lottery. I had to read it twice before reality kicked in.

A) I hadn't bought a ticket
B) National lottery does not advise its winners via email

The email didn't ask for money up front or for bank details just personal info AND a copy of a driving licence or passport in order to verify you as a prize winner (and steal your identity - of course)

I know I'm speaking to the converted - but - be careful out there