Well this is an embarrassing question. I was fired for just cause from my last job. Most job openings have a section on the application form for reason for leaving last job.
I don't believe I was justly terminated and am looking into disputing it with the labor board. Just cause is for severe situations like stealing from the company, which I didn't. Where I live it's not employment at will, and a company can save paying severance fee if they terminate someone for just cause. However, the "pro bono" legal advice I got is, the company is aware it would cost more in legal fees to file for dispute than could be won, and they're betting no one will do so. Apparently they fired a lot of people around the same time, my friend was fired for going home sick.
Also I had already been looking for new work before I was fired.
So without lying, what's the best reason I could give for leaving my past job? Should I put I may have been unjustly terminated, or that I had been looking for work before it happened? Should I just say fired or would it be lying if I don't add "for just cause"?