I am afraid my previous employer is saying bad things about me when prospective employers are calling them for a reference check. My question is, when I applied to a job about three months ago I had to sign via the internet a waiver that says the previous employer can not be liable if they say bad things about me. What I need to know is if that only applies to that situation or for any job I apply to? If they are bad mouthing me I might want to take legal action. Thank you.