A release gives up a right, such as releasing one from his/her liability for harm or damage that may occur from performing under a contract, or participating in an activity. Some activities are considered inherently dangerous, and those who participate in such activities may be required to sign a release form, acknowledging that they are assuming the responsibility for their voluntary participation in such activities. The release acts as an assurance to the person requesting the release that they will not be subjected to litigation resulting from the signing party's informed and consensual acts.
The term waiver is sometimes used to refer a document that is signed before any damages actually occur. A release is sometimes used to refer a document that is executed after an injury has occurred. Many courts will invalidate documents signed on behalf of minors.