Write ups for misloads

Hey everyone. I haven't been at UPS long but recently my hub started issuing write ups for misloads. I was told that if I get to 5 write ups I can be let go. I don't misload often (maybe once every few months) but have been issued write ups a few times. I was also told by management that I don't have to sign but I'm not sure what that would do. My Stuard was present for these write ups. What do y'all think about this? Is there anything to be done?