Just "Like" their Facebook page and fill in the form.
http://www.facebook.com/?ref=home#!/CasaBarilla?sk=app_207356515967668This is what is posted on their wall so maybe its only for today? Better hurry!!!
We've got a Friday treat for our favourite Facebook fans - Barilla is giving you the chance to enjoy one of our delicious pasta sauces for FREE! Yes - GRATIS! Just click on the 'Free samples' app on the left of our page, leave your details, and we'll post you a jar of Barilla pasta sauce for you to whip up an authentic Italian meal. All we ask is that you spread the love and please tell your friends all about this fab offer! Ci piace!
Good Luck!