Communication in VANET is fully responsible on exchange of information among various vehicles also called as nodes present in network. A vehicle can be used to provide safety, security and emergency alert to other vehicles with the help of VANET. The network use information received from different vehicles to perform majority of decision. But there can be one or more node who may behave as Malicious or selfish node to get advantage over other vehicles. A misbehaving node may transmit false alert, alter message, create congestion in network, drop, delay and send identical packets more than once. Hence it is very critical and absolutely necessary to detect misbehavior as it lead to catastrophic consequences. The paper organizes as follows: the next section contain about information about VANET, the categories of misbehavior detection techniques is briefly explained followed by various research performed by experts for detecting misbehavior in VANET. At last the paper concludes with various research scope to make VANET more secure and reliable.