Some sponsors run invitation only challenges where they hand out codes through the Bhoozt app or through their stores, social media pages and websites. If you have been lucky to receive a code that is still valid, click the key icon at the top right of your app and enter it. 

Please note that often sponsors invite people based on their location and age group. So for the best chance of getting codes, please ensure you have the correct birth date and location services enabled in your Bhoozt profile.