A "nametag" is a small piece of paper, plastic, or other material with someone's name written or printed on it. It is usually worn or attached to something to help identify the person. Full definition
Have students wear nametags with their name, their school, and their teacher's name for the first week or two. (edutopia.org)
Technicians must wear nametags identifying themselves as pharmacy technicians and display their registration certificates at all times while working. (pharmacytechpros.com)
My beloved aunt Red was tending bar and in charge of getting nametags on the guest. (automobilemag.com)