http://legal-dictionary.thefreedictionary.com/release :
"A contractual agreement by which one individual assents to relinquish a claim or right under the law to another individual against whom such claim or right is enforceable."

http://www.las-elc.org/factsheets/severance.html
"Your employer may decide to give you severance pay only if you sign a release of claims. A release of claims is a contract “waiving,” or giving up, any potential legal claims you may have against the employer, either now or in the future. These contracts are generally legal and enforceable."

Voorbeeld van een confidential release agreement:
http://tinyurl.com/6oa3voz