If you are entitled to book reserved seat upgrades with your AFL or club membership, you can book these online through Ticketmaster.
Search for the game for which you're looking to book tickets, and you'll notice that several options will appear, with "Club Members" and "AFL Members" listed.
Select "See Tickets" for the event applicable to your membership, and you'll be prompted to enter your barcode numbers from your membership card.
Once you have submitted these numbers, you'll be able to purchase your tickets at the upgrade price. If applicable, you will also be prompted to add additional tickets or Guest Passes to your order.