badge

A badge can be any token, sign, or emblem, that is worn on a person's clothing.

Example: Check out my new badge, I got it for tying a new knot.

A badge can be a small card that tells information or identifies the person who is wearing it.

Example: Write your name on your badge for the first day of school.

To badge is to mark with a badge; reward.

Example: The army will badge you for your efforts.