Watermark/Branding images

[mrsrice22]

For either prints or digital negatives do you add your watermark/logo/brand?

I was looking at some old photos (my senior pics and some of my oldest son from his school) and they all have the portrait studio name either on the front or back of the image. These are from over 10 years ago, so I'm just wondering if photographers still do this so that your name is on your prints/negatives?

Now that I think about it, I haven't seen it on any photos that co-workers, friends, family have shared.

EDIT: I mean on the prints/negatives that you sell to your clients, not those that you post on websites