It is often difficult to know if your employer did something wrong when firing you. That is because employment in California is often at-will, meaning you can quit at any time without reason and your employer can let you go at any time without reason. The only exception, and the time when wrongful termination comes into play, is when discrimination is present.
Forbes explains that wrongful termination depends on whether discrimination exists. Most of the time to prevent claims of discrimination, an employer will have a documented reason to fire you. For example, if you have a bad habit of missing work all the time, which would have documentation to back it up, then your employer could fire you without it being wrongful termination.
On the other hand, sometimes an employer may fire you for a reason that he or she does not see as discrimination but is, in fact, according to the law, discrimination. You have to consider the motivation behind the termination. Also, you need to look at the laws and see if the actions had anything to do with your race, religious beliefs, gender, age or other protected characteristic.
Keep in mind, too, that employers must treat all employees equal. If there was an incident at work and only you were fired even though there were other employees involved, then it could be a case of discrimination and wrongful employment.
If you feel discrimination played a role in your termination, then you first must contact the Equal Employment Opportunity Commission. This information is for education and is not legal advice.