The article is devoted to the study of the renvoi doctrine on the example of the countries of the Romano- Germanic legal system: France, Germany and Italy. The author analyses in detail the decisions of the courts that have established precedents for the application of this doctrine. The author points out that France is considered to be one of the founding states of the renvoi doctrine and the term «renvoi» became world famous after the Forgo judgment. The author analyses the cases in which the French courts have applied the principle of deference to resolve conflicts of law. Examples of changes in French legislation that excluded the rules of deference for decisions in inheritance matters are given. The author analyses in detail the French statute on reference to the legislation of other states and the rules of interpretation of legislation in cases where it refers to France or other countries. The process of creation and implementation of the Code of Private International Law in France is considered.
 The author highlights the practical aspects of the use of deference in France and notes that, despite the existing doubts and problems, deference is becoming increasingly acceptable and widespread in the practice of private international law. The author analyses the peculiarities of German conflict of laws in the context of situations where a backward reference to the law of a third state which is not a member of the European Union (EU) is made.
 It is established that in the practice of German courts, the concept of implied deference is used to achieve justice and ensure predictability and stability in the resolution of international disputes. It makes it possible to preserve the principles of foreign law while using national law for this purpose.
 The author examines the issue of retroactive reference in Italian law, which requires that a court apply conflict of laws rules to a case on its own initiative. The article provides examples of a court decision in a case where the issue of application of the renvoi doctrine arises.