Mobile Ad-hoc Networks (MANETs) are self-managing network which consists of distributed nodes that communicate with each other through wireless links with no fixed infrastructure. Due to dynamic nature of these networks routing protocol are susceptible to various attacks. The black hole attack is one of the noticeable security threats in MANETs. In black hole attack the packet is redirected to a node that is claiming of having shortest route to the destination node but instead it intercepts the data packet and retains it. This paper, presents an approach to overcome black hole in MANETs. In proposed paper nodes validate each other by issuing security certificate in digital form to all the other nodes in the network. The proposed method is to be adapted on Location Aided Routing protocol with Dynamic Adaptation of Request zone (LARDAR) protocol.