Not sure whether this should be listed under freebies as you have to pay for the item, print off a form (from the chicagotown website) and send them all off along with your receipt.
I saw these pizzas in my local Tesco store (but it is a nationwide 'offer'). The 4 cheese pizza and peperoni pizza are for sale at £2.99 each (which isn't the cheapest ever) BUT, you can claim your money back if you think the pizza isn't as nice as a 'takeaway' pizza... ie. pizza hut / dominoes etc!!!! Print out and complete the entry form, send along with your till receipt, the promotional area on the back of your Takeaway pizza packaging and self addressed envelope.