106. Alterations and additions.

A material alteration made after execution to a deed or a document without the consent of all the parties to it prevents the person who is responsible for the alteration from enforcing the deed or document1. A lease by deed under which the tenant has entered but which has been rendered void by a material alteration may be used to show the terms of his occupation2. An addition which expresses only what the law would imply is not necessarily treated as an alteration and so may have no adverse consequences