In recent years fraud rings have been developing new scams that evolve along with the change of social environment. Their rampant and arrogant behaviors have prevented general public from living a normal life. The frauds in earlier years targeted at elder, children, and women because these victims’ vulnerable social experience gave the fraud rings more chance of success. Today, subjects for frauds involve even people who receive higher education such as doctors or engage in prestigious occupations including physicians, judicial officials, and public servants. The tricks they use may include tax refund notice from National Tax Administration, returned registered mail at post office, lucky draw winner notice, etc; every social activity that is commonly seen by general public can be used for scams.
　　The key to the success of a fraud is often connected to “greed” in human nature. Criminals often use the greed in people by giving incentive followed by sophisticatedly designed interactive techniques rehearsed by the members of fraud rings to win trust and entrap the victim.
　　Public servants serve general public; conducting administration according to regulations is the principle for public servants, and obedience of laws is the basic requirement. Public servants should respect themselves more than general public do and should not have any greed; otherwise one mistake may cause everlasting regret.