jQuery Validator Unbinding

I'm not really familiar with this plugin, but from the documentation it looks like what you want is:

$('#sweepstakesForm').rules('remove');

Try

$('#sweepstakesForm').data('validator', null);
$("#sweepstakesForm").unbind('validate');

Try adding an .unbind('submit')

$('#sweepstakesForm').submit(function () {
    $(this).unbind('submit');
});