I agree with this many exchanger cannot be trusted my friend already send coin to other exchange but there is no coin receiving in her wallet, 
always take care when you send your coin to other exchanges.
always take care when you send your coin to other exchanges.If that has heppened to your friend, then he must contact the exchange in question as something could be wrong. Also, what is the exchange he sent his coins to? If he sent his coins to a shitty/shady exchange, then it's for a big part his own fault.