So I have been working for ups for about two years now at the Jacksonville, FL hub. Last friday I left work without asking my sup first. I understand I'm not supposed to do this. Well rather then write out a warning letter or give me a talking to. My sup decided to change my time. I work the twlight shift and start time is 5:00pm on Fridays. When I left I clocked out at 11:00pm meaning I got 6 hours in total. When I came in for work yesterday I looked at the time sheet and saw that my clock out time had been changed from 11:00pm to 10:40pm. We use the hubcom system to clock in and out so I have no paper record of actual time worked.My question is this. Is there anyway for UPS to see what time I actually clocked out and that my sup was the one who changed it? and if so isn't what he did illegal? and what should my next step be in resolveing the matter? I feel like if I bring this up at work there will be retaliation but I also feel like I can't morally let this go. I come in early everyday and work harder then most the people on my PD. I dont even take a bathroom break and am constantly working. any response would be appreciated thanks.