> ## Documentation Index > Fetch the complete documentation index at: https://moengage-docs-mcp-segmentation-tool-belt.mintlify.site/llms.txt > Use this file to discover all available pages before exploring further. # MismatchsenderId: How can I send push notifications? > Fix the MismatchSenderId error in Android push notifications by ensuring your Firebase private key and google-services.json are from the same project. MismatchsenderId can happen while sending the push notifications primarily due to a conflict between the private key uploaded on MoEngage dashboard and google-services.json file in the Android project. Kindly ensure you use the private key and the json file from the same project. ### Incorrect google-services.json file Every Firebase project will have a **Project ID**. There are **couple** of things to check for correct json file. * This Project ID should be same in the google-services.json file that is present in your Android app. Screenshot 2024-02-01 at 1.38.10 PM.png Screenshot 2024-02-01 at 1.37.44 PM.png * Package name in your manifest file also should match the **package name** in the google-services.json file Screenshot 2024-02-01 at 2.40.20 PM.png ### Incorrect private key on MoEngage Dashboard To verify if you have uploaded the right private key, the project\_id in the private key should match with the Firebase Project ID. You can open the private key json file in any text editor and it will have the **project\_id** key with value as your project ID. Screenshot 2024-02-01 at 2.37.14 PM.png Private key is usually generated from service accounts page, **don't generate** a new key if you already have a key.