The tools of nature and their effect on accepting the nature of the unilateral legal act of testamentary disposition ,endowment and donation (review of the opinions and thoughts of Professor Jafari Langroudi)

Knowing the effects and rules of credit beings depends on identifying their nature. The importance of nature is due to this and other factors such as non-possession and interference of legislators in matters of rulings and its referral to custom and also the inevitable conciseness of custom in some subjects, therefore the need for scientific effort and substantiated opinion of the doctrine is certain in identifying the legal nature. In this article, we examine the views of Professor Jafari Langroudi - one of the activists in the field of philosophy of beingsCredit and the nature of these creatures - we look at the tools of nature and the impact of these tools are studied to prove the nature of unilateral legal act of testamentary disposition, endowments and donation to be explained From his point of view, what are the means of knowing the nature and what effect do these tools have on the acceptance of unilateral legal act about mentioned institutions and denial of their contractual nature? One of the features of this research is that in this research, with more than one hundred and twenty references, more than twenty works of Jafari Langroudi have been cited.