By law, many transactions are required to be in writing. Because of expediency, many more transactions are put into writing. A written transaction is called an instrument. An instrument is a result of negotiations. Sometimes, an instrument may fail to express the intention of the involved parties. Rectification of such an instrument may become necessary. Help towards parties who want to have their documents (which are mistakenly executed) rectified, is provided in Specific Relief Act. Closely related with documents mistakenly executed, is the category of documents which are at a later point found to be void or which become void. These documents ought to be cancelled. Specific relief act provides relief from such kinds of documents. Also, there is a category of contracts which, for some reason or the other (e.g. lack of free consent) can be deemed voidable by the party which consent was not free. This party has the right to have the contract rescinded