Only a handful or protected classes exist regarding at will employment in Arizona.
Gender, age, race, religion discrimination are protected classifications. In all other respects, an at will employee may be legally fired for no reason. Here there was a reason about a work mistake.
It would be nice if the employer had been more flexible and understanding, yet it was not illegal for the employer to have been rigid and firm in firing you
Arizona is an "at will" state, which means you can be terminated for any reason or no reason at all. However, one exception to that rule is a contract. If you have a written contract with them that expressly states you are to be employed from one date to another, you may have a wrongful termination case under ARS 23-1501. Please feel free to contact my office to set up a consultation. Thanks.
Matt Fendon, Esq. 602-256-2000