Deception in any nature is not right, we all know relationship it can harmful for both partners but what about when people lie to sell something which is done all the time. we always kept from the truth and many a times lied on the facts of that product. Deception is one of the most controversial aspects in psychological research. The definition of the word deception is not always clear and is defined differentially by different people. An example of this is Hey (1998) who pointed out that ‘there is a world of difference between not telling participants’ things and telling them the wrong things’. On the other hand Adair, Dushenko and Lindsay (1985) define deception in psychological research as: the provision of information that actively misleads participants regarding some aspect of the study. Christensen (1977) defines deception in psychological research as an explicit misstatement of fact. Should a person be lied in name of research I feel its fine because something comes out of it and its not much harmful in these cases. But what when harmed in the name of research is it right?????????