@Santosh.uniq Hello, 

Please reboot Tapo camera and test for several hours and see if Tapo APP-> APP Message Center ( Envelop icon) got any motion detection message 
 

Also make sure you have turned on some settings on Tapo APP:
 

•  Tapo app-> Camera settings-> Detection & Alerts ->Motion Detection is ON &   Activity Notifications is ON and  ‘Always ’ 
•   Tapo app ->Me -> Notifications -> Camera Detection Messages is ON

If still the same issue, please try the debug tool I sent you via private message and help collect Log and information below, thank you: 

1) Model of mobile  phone including its Android/ IOS version: 

2) a photo of Motion detection settings & a photo APP message center

3) Tapo camera model firmware and Hardware version ( Tapo app--> Camera settings-- Advanced settings): 

4) Log file