Hello all

I have a problem with Google Cloud Messaging (GCM) service .
this : -
https://support.google.com/googlepla.../2663268?hl=ar

I did that in my android application .

always I send notification to users by open a page in my domain ( I write the things in the page and then I press send when I send press button
will go notification to the users of my android application )

but my problem now : If any user download my application and the delete the application and download again he will receive notification twice
also if he do same process third time will will receive notification 3 times . like this way !!!

please can help me about this problem

thanks