Watching facial expressions in order to determine whether a person is lying, might just save you from being a victim of fraud. Jury analysists do this when assisting in picking out a jury. The Police do this when they are interrogating. A lie detector of course does this, but are a little heavy to walk around with. Therefore, we have to learn the little facial and body expressions that can help you learn to recognize a lie from the truth.
Steps 1.
Forced Smile
Watch for forced smiles which are easy to spot since they only involve the muscles around the mouth. They will appear as being overly relaxed and not really happy. Look at the mouth, and see if you can see their teeth. A real smile will reveal a bit of teeth but a forced smile will not!
Steps 2.
True Smile
Look at the facial muscles, as well as a wrinkled nose. All these are signs of a real smile. When a person is being truthful, more muscles besides the mouth reveal their truthfulness. The eyes would begin to squint and the cheeks point down and the teeth will show. All signs of a genuine smile.
Steps 3.
Observe their hands, arms and legs which tend to move slightly towards themselves when they are lying. Their hands may touch or scratch their face, nose or behind their ear. They are not likely to touch their chest or heart with an open hand.
Steps 4.
Notice how they will usually avoid eye contact. Not many can look into someone's eyes and tell a lie. Stare at them until they look into your eyes.
Steps 5.
Watch their reaction and notice their delay in responding to questioning, a sign of them being liars. They wouldn't be shocked to hear why you are questioning them, nor reveal sadness after being told. Their emotion would remain for a longer than usual time. Notice also how their sad face suddenly switches off and their face returns to normal.
Steps 6.
Observe how uncomfortable and restless they become, when a pause or a short amount of silence is entered into the conversation and they begin to add unnecessary details to the conversation.
Steps 7.
Watch the person's eye movements. When someone is trying to remember something, he looks to the left; when he is trying to make something up, he looks to the right. This is because the right side of the brain is the creative side. A liar will look to his right more often than his left.
(diambil dari sumber gw waktu surfing .., lupa gw .. sori bgt yak)
wadohhhhh.....bhs planet neh 
pake bahasa indonesia ya biar yang lain pada ngerti 
pertama gw pengen ketawa dulu baca komentar @Ngapaker, @kakap merah, 'n segho thiwul.
