When it comes to severance agreements a company would want your signature agreement on the separation, even in the case of at will contracts to limit the legal issues you can take. I believe most severance packages a company would offer would be standard for the amount of years that you worked there, but you may be able to negotiate a better agreement depending on your work history, the reasons – if any that you’re being dismissed, but there are likely certain legal limitations that may require the company to leave certain items off the table.