All you have to do is, receive a snap chat, then hold down the snap with left thumb hold and hit lock + home and let got home and hold lock key that way your phone will consider a minor error so it won't notify a screenshot. REMEMBER im not responsible for your use of this find credits goes to me and at first snap yourself and try the method snap a friend and screen then but let them know and see how fast and accurate you can screenshot make sure your have enough time to screen it thanks Charlesita is out