Yeah, I can't find it anywhere on my Mac. But spotlight did send me to an "iBoost" site that claimed it was a Wacom product. Nothing about it on Wacom's site. I think I'll give them a call tomorrow.
What is the exact text of the notification? What icon is associated with it? Please post a screenshot, if possible.
Consider the possibility that the popup asking to enable notifications is lying. That is, it could be scareware, coming from a browser notification, for example.
Here's a couple of my recent posts regarding scareware:
Yes, since I had never heard of it I was not going to give it any permissions. But Wacom claimed ownership. As part of the tablet driver. I guess that's why searching for it came up blank.
Edit: And Login Items did have an 'umbrella' Wacom entry with 4 items but no further specifics.