Yeah, the form on the back that says if you have a reason to go or not. Usually they ask you to mail it in ahead of time. You just sign it and check why you can't go XD

Ugh, I loved jury duty 'cause I could miss work, but I was starving there since I didn't bring any food or money... and they had WiFi there!! But I didn't bring my laptop... so I was just tired and bored. Lots of people slept. I didn't get called in, so didn't have to serve =D