S P Chengalvaraya Naidu Vs Jagannath AIR 1994 SC 853

"...The principle of "finality of litigation" cannot be passed to the extent of such an absurdity that it becomes an engine of fraud in the hands of dishonest litigants. The Courts of law are meant for imparting justice between the parties. One who comes to the Court, must come with clean hands. We are constrained to say that more often than not process of the Court is being abused. Property-grabbers, taxevaders, bank-loan dodgers and other unscrupulous persons from all walks of life find the court-process a convenient lever to retain the illegal gains indefinitely. We have no hesitation to say that a person whose case is based on falsehood, has no right to approach the Court. He can be summarily thrown out at any stage of the litigation... A fraud is an act of deliberate deception with the design of securing something by taking unfair advantage of another. It is a deception in order to gain by another's loss. It is a cheating intended to get an advantage... A litigant, who approaches the Court, is bound to produce all the documents executed by him, which are relevant to the litigation. If he withholds a vital document in order to gain advantage on the other side then he would be guilty of playing fraud on the Court as well as on the opposite party."