To see your certificate info log in to your Aviator Silver card account on
www.barclaycardus.com My webpage has a small blue "Rewards details" hyperlink next to the "EARN MILES Earn 5,000..." section at about the middle of the page. Click on that, then click on the arrow > to the right of "View my Rewards activity". All your earned benefits are on this page including a video link on how to redeem your certificate (if you have earned one)