There are some situations where you cannot use a waiver form to avoid liability. The terms of such a document may be invalidated if the damage is caused by complete negligence. It can be considered invalid if the releasee fails to provide adequate care. The court may also reject the release document if it does not properly explain its details and risks. Moreover, the document can be deemed invalid if it's bad-structured and hard to read; it's highly recommended to put essential details in bold. As a rule, all release agreements will be considered invalid if signed by a minor or individual lacking the mental capacity. In these cases, the release document should be signed by a parent or legal guardian.