Blank postcards are not used by many. However there is a separate segment which favors use of blank postcards. Blank post cards are usually used by people when they want to hide their identity. However this is not the only situation. They are also used by detectives and law enforcement officials for the purpose of investigation. There is also a great controversy regarding their usage. Some of them admit that it is used only with a genuine intention. However others differ on this as they say that it has been used in an unethical manner.

Further they add that it is primarily meant to serve certain vested interests. While there are lot of difference of opinions on the intentions and the credibility of such usage and there are several undisputed facts in this context it must be remembered that they have helped in several important occasions. Considering the gravity of such situations even those who oppose unanimously agree that irrespective of the means and its merits these have helped a lot in the society and can play a vital role in the future too. Whether the question of ethics arises varies from individual to individual and more importantly the law of that particular land has to be taken for consideration in this aspect.