HI Tassine, Thank you for your post. The warning means that anyone can call it, as it is public and does not require permission (a receiver can request a specific permission to be called). You can safely ignore this warning or you can remove this warning by adding android:exported="false" to the receiver tag. In order to get the IAP test working in the sandbox environment you need to do 2 things correctly. 1. Prepare amazon.sdktester.json with correct definition of IAP items and push it to /mnt/sdcard of your device/emulator 2. Install Amazon SDKTester Application on the same device. Please refer below link for guidance,
https://developer.amazon.com/sdk/in-app-purchasing/documentation/adobe-training.html Though, above documentation is a part of IAP Adobe plugin docs. But the steps mentioned there should followed for all platforms. Hope this helps.