In most jurisdictions the only thing a company in the US is legally required to do is pay you for the days you've worked in the pay period you are terminated.

In most jurisdictions the only thing a company in the US is legally required to do is pay you for the days you've worked in the pay period you are terminated. If they let you go, they are also usually required to give you your final paycheck at termination time. Mandatory severance is not part of the law.