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Forum Moderators: phranque
From here, YMMV depending upon what kind of contest you're envisioning. I highly recommend auto-emailing the entrant a confirmation of their entry. This really cuts down on the queries you'll field from contestants.
Had the terms & conditions right on the entry page, between the bottom of the form and the submit button... everyone had to at least scroll blindly past them to enter. ;) (How many licensing agreements did you actually read *before* you installed the software?)