Is it fair for a manager to reprimand or fire someone for completing work outside of assigned tickets?

You might want to consider your options regarding unfair treatment. If you're being reprimanded unfairly, it could be worth looking into labor laws in your area. Just don't sign anything without understanding your rights.

Honestly, it might depend on where you work. There are certainly places out there where firing someone for not following the ticket system would be justified. But if you're performing your job well, it sounds a bit excessive on your manager's part.

It really depends on the company culture. Some places treat ticketing as a crucial part of their processes, meant for auditing purposes. If changes are made without appropriate tickets, that might lead to issues down the line. However, if you excel in your role and deliver great results, it feels harsh to fire someone just for that. It's usually better to follow your employer's rules, and if your boss is serious about it, it’s wise to take it seriously too.

It honestly seems a bit over the top to fire someone just because they're completing work outside of tickets. If you're providing high value and keeping clients happy, that should matter more than rigid adherence to processes. Just make sure to document your contributions!

In the U.S., you can get fired for pretty much anything, even if it seems unfair. That said, it sounds more like a management issue than a personal one. Just try to keep the communication open and document any conversations you have.