So I got a write up the other week for something stupid, it was for not notifying my shift supervisor that police were at our site about a case they were working on, I notified my internal security for the company I have a contract with and they took over from there. But apparently I was supposed to notify my supervisor immediately whenever police are on site and get the police officers badge numbers. My supervisor was upset that I did not notify her on time, I told her I didn't know this. At the same time we were busy inside checking people in and out and my newest guard was new and they were on X Ray, so it was a lot to deal with. The next day or so I got a write up, me and my shift supervisor talked it out but I still believe I shouldn't get written up for this, she could have talked to me about the mistake first of all instead goes straight to my newest account manager and they said to write me up.
I've been with the company and same site for over a year and 14 months perfect attendance, never called out or been late to work and always do overtime, but this happens when I get a new shift supervisor and new account manager that doesn't handle things that well at all.
What can I do at this point, I heard I can go to HR and try to resolve the matter or if it will make things worse.
Thanks for any advice is much appreciated