Here you have to get permission from your supervisor to come in early but we have a perpetually short staffed kitchen. A fellow cook asked me if I could come in a half hour early and after texting my manager and him agreeing I did. I went to check my hours at the end of the pay period and the business manager had gone in and manually taken that extra half hour off! Which even if I hadn't been approved to clock on I don't think they are legally allowed to do. They can write me up for doing something without my supervisor's permission, but that doesn't change the fact that I worked that time and am entitled to compensation.
My manager has said he will talk to them, but I started with this company six months ago and this isn't the first time they've cut corners. They haven't done something so blatantly against labor laws to me before though. I have a friend from Alaska coming to stay with me for two weeks next week, and can't afford to quit without a job in place, but when she leaves its back to the hunt with me. Yeah, there are PLENTY of jobs open, but a job that won't try to cheat you is another thing.