Password Reset Notification Possibly Solved

Password Reset notification drove me nuts for the past two days. Already have 2 factor ID, and I changed my apple ID password. Notification still came up. Checked my apple account and system. Nothing amiss. Booted several times. Notification kept coming. I called MAC Support. They spent over an hour trying different things. Bottom line is they had me go to system settings, sign out of my apple id (which takes a long time btw) and then sign in again, which seems to have done the trick. If that doesn't work. Call Apple Support. One of the things they had me try worked. I think the last one was the one.