The Study of the Legal Nature of the Delayed Payment Penalty in Iran Law

There are legal doubts about the interest of "delayed payment penalty" rise to conflicting views on the legal, economic and related laws were continued. So knowing that, except with respect to both the nature of the legal, economic, and legal and customary use of specialists (in the statistics) will not be possible for the legislative and judicial interpretation efficient absolutely necessary. So try the authors of this paper, we have briefly reviewed the history and current views, are based on the economic concepts of interest to identify differences in delay penalties, compensation for the value of money and non-profit interest, the true nature of this institution will introduce.