Verification failed error after purchase

[yashodeep9]

Hello, on clicking buy button the purchase pop up is shown and purchase continues but on console it gives following error :

E/IABUtil/Security: Purchase verification failed: missing data.
[ERROR] : IabHelper: In-app billing error: Purchase signature verification FAILED for sku com.xxx.xxxxx..xxxxxxxxx
Here I am using actual product id and not the android test ids.