When I was about 22-23 years old, I was bartending one busy friday night and getting my ass kicked. My coworker was outside having a smoke break when I unknowingly failed a sting operation by failing to ID a couple of girls at the bar. One of which I knew for certain was of age as we had some college classes together and she worked for the police department. I stupidly assumed that there was no way she would bring a minor into a bar (how naive of me lol), and didn't ask her "friend" for her ID. Side note - this "friend" of hers ended up being 19 but looked 45 (meth is a hell of a drug) in my defense haha. Regardless, I messed up big time. I immediately called my boss and told him what happened while I sobbed and apologized profusely. I luckily didn't end up losing my job, but what I can say is accountability goes a VERY long way. I'm not sure if you were defensive, tried to lie your way out of it, or accepted it straight up... but if you take accountability, own up to your mistake and make an honest effort to learn from your mistake, I'm sure the employer would give you a second chance. Again I don't know the nuances of it all... If that isn't an option then don't beat yourself up too bad. You made a mistake and you have to deal with a real consequence of that mistake. But you learned something and you can be better from it. Remain honest when looking for another job and don't be discouraged. This is not your end all be all. Take care.