Unwanted Google Keep reminders when Google Keep is not installed
I had the same issue. When the notification appears pull down the notification bar. From there hold down on the Google Keep notification. A little pop up with 'App Info' will appear. Click on it. That will show you what app is causing the pop up. From there you can either disable the entire app or disable notification. For this insurance it looks like it is Google Play Services that is the culprit. I choose to disable the notifications only.