Fictional company: ACME

Civilian legal replicas of Federal agency badges plus, Zootopia police, National Security & Guard Dog Security (Armed and Dangerous), by Smith & Warren

In the United States of America, as far as I know, while in seemingly all states (not entirely sure about territories or possessions), badges (like what law enforcement, private security, and so on and so forth) are legal for civilians to have as long as they're not impersonating a person of authority (ie law enforcement), even if the badges visually identical to real state or local agency badges.

However, from what I've read, many badges of federal agencies are restricted. So, here's some replicas I've come up with credit of Smith & Warren's badge creator.

Disclaimer: I am NOT responsible for any legal incidents that happen if anyone tries to get ahold of these in real life. This includes anyone using these accessories in an illegal fashion, purpose, and/or intent.

Real-life agency: Secret Service.

Real-life agency: U.S. Marshall service.

Now, the FBI will be trickier becuase of the original badge design, but I'll do what I can;

And, here are the replicas of Zootopia/Zootropolis police badges;

Compare these with the original badges below:

DISCLAIMER: these last 2 images do NOT belong to me. They were obtained credit of http://disney.wikia.com/wiki/File:ZPD_Badge.png. If you own any one of these images and wish for me to remove them, please say so in the comments below and I will remove them within 24 hours.

National security:

Guard Dog Security (from the movie "Armed and Dangerous");