You are obligated to record point-of-view demos in every match you play and store them until two weeks after the date the match was played.

If a player can not provide a demo when asked by an admin, the map in question counts as a default 0:30 loss. No further punishment.

How to record a demo?
Type "demorec your_demos_name" in the console [F10].

If you use the exact same demo name a second time, the older demo file will be overwritten!

Recorded demos are by default stored in
"C:/Users/your name/Documents/My Games/Unreal Tournament 3/UTGame/Demos" (Windows 7)

"C:/Documents and Settings/your name/My Documents/My Games/Unreal Tournament 3/UTGame/Demos" (Windows XP)