405989

Deal is advertised as 3 Traditional Pizzas + 2 Thickshakes $28.95 (Pick up), however you can swap out the thickshake for a 4 pack of Sundaes, as discovered by donga100 last month. Thickshakes are usually $5.95ea, while a 4 pack of sundaes are usually $10ea so it makes it much better value. Just click 'swap' next to the thickshake once you've added the voucher.

This is a long term coupon that just started yesterday, runs until 2/2/20 or until Domino's remove the swap option. This and others are added daily on the OzBargain Pizza Coupon Page. Domino's are doing their usual BOGOF Tuesday deal today as well if you prefer.

Edit: If the code doesn't work at your store, try 668220 for 2 Traditional Pizzas + 8 Sundaes $23.95 (Pick up) instead. Otherwise check the Domino's Offers app for any alternate code.