I don't really know what you mean by "settlement". There's no settlement that I know of when you get fired in the USA.
Here, a "settlement" is something you might get if you were to sue someone for something and the court awarded you money.
Here, a "settlement" is something you might get if you were to sue someone for something and the court awarded you money.
Also, in the states, if you're laid off, you can apply for "unemployment benefits" from the state. If you're fired, you cannot.