In a descriptive-analytical way and with a comparative approach, while stating the definition and types of electronic documents, this article examines the differences between electronic secure document and official electronic document and examines the validity and existing laws in family lawsuits according to the history of documents in Iran. The results of the research show that most Iranian laws do not have an explicit definition of an official electronic document, and to define this type of document, one must refer to the interpretation of the traditional regulations governing paper documents, but the Law of Electronic Commerce (1382) and even the Law of Computer Crimes (1389) The principle of validity of electronic documents has been confirmed and there is no problem in citing such evidence, but at the same time, this matter can be examined from several aspects. First, in terms of the nature and as a result of the scope of the credit title to them, secondly in terms of the quality and quantity of related legal articles and their strengths and weaknesses. Third, the inability of the technological level to meet the strict legal standards in the originality of the document against the copy. Therefore, although electronic evidence in divorce matters is valid according to the law of electronic commerce, but due to the complexities and issues of marital and family matters, the judicial procedures rely on traditional and solid reasons and only as an evidence. Along with other evidences, it may become the judge's knowledge, or even without other evidences, it may create a strong suspicion for the judge and issue a verdict based on his knowledge.