Is there such thing as as "mandatory overtime"?
I lwork at a food distribution warehouse. My boss has posted a bulletin asking employees not to make plans for the weekend since we are moving from one warehouse to another. He is saying that it's mandatory overtime. Do I have to go although I'm already going to do my 40 hours that week?
First of all, overtime is regulated by federal law. Assuming that you are a non-exempt employee, to the extent that you work over 40 hours, you are entitled to overtime pay for any hours you work over that.
As for being required to work such time, the answer is that unless a term of your employment provides otherwise (ie you have a union or employment contract that prohibits this or there is a specific stated company policy to the contrary), you are considered to be an "at will" employee. What t his means for you is that your employer can impose any terms and conditions on your employment as it sees fit. This includes working overtime.