Hi friends, I'm very happy to share today experience In-app purchase server-side validation you. This link is very use full for me to implement this server side validation. Please refer this link, https://github.com/aporat/store-receipt-validator I have faced some problems with Android server side validation. I will share problematic experience with you.......... https://developers.google.com/android-publisher/authorization -> go through this URL and flow this steps If you follow the steps, you will get a client id and client secret. While doing this process it will ask you for redirect URI, you just any of your project URL for testing purpose to get the token http://localhost/project/public/refresh-token I Just gave a refresh token function as return URL. In this function, $request->code you can retrieve the refresh token Using this token you can do this process Exchange this code for an access and refresh token pair by sending a POST reques