Every driver’s probably gotten a speeding ticket. Maybe you were late to something important, or you got that one “bad cop”. Either way, this tip may help you fight your case in traffic court. When you’re in front of the judge, ask the officer for proof that his radar gun was properly calibrated. In some jurisdictions, the original certificate of calibration must be presented, not a copy. If the police officer has the original, you’re out of luck. But if he only has the copy, you might’ve just dodged a fine. Just remember, this tip isn’t bulletproof. Don’t rely on it, ever. Simply use it if you’re in a jam.