the study of characteristic personal and economic of the obligations in civil law with comparative study in french law

in the legal systems of rome - germanic, there is unique sources and unique elements for the obligations that talking of obligations commons isn’t useless. in spit of this there was confused reasoning in law of rome and french law that it has been effective on law of obligations of the other country end iran and nowadays in news books of obligations in french law before of the other topics and for prevention of confused reasoning there is a topic of the place of obligations .in the law of iran there is confused reasoning between obligation and contract. therefore it is necessary that the place of obligation is became clear with the theories that comparatively is be studied in this article.