What are the terms used to describe when someone who is unauthorized sneaks past a security point by closely following the person in front of them without consent of the person in front of them?

Question

Quizplus · Accepted Answer

When an individual follows close behind another to gain unauthorized access into a secure area without the consent of the individual being followed, the individual is said to be tailgating, which is a form of piggybacking.
Key Takeaway: Piggybacking is the process of following close behind an authorized person to gain access to a secured area, with or without the authorized person's consent. If the person being followed does not consent, this is referred to as tailgating.

What Are the Terms Used to Describe When Someone Who