Licensing of activities is a form of securing the interests of the state and citizens in a economic sector that is important to them. In the interwar period, the Polish authorities used this instrument, among other things, to control the insurance market. Licenses were required from both insurance companies with domestic and foreign capital. However, due to the specific nature of the insurance market in Poland at that time and the problems that the founders of independence encountered in relations with foreign countries, the government treated non-Polish entities in a special way. The experience with the reliability of this type of insurers during the partition period and immediately after the establishment of an independent Polish state was of great importance or mutual relations, prompting us to treat foreign insurers in a special way. Therefore, we observe a significant number of regulations and a large dose of activity towards foreign economic entities operating in the field of insurance.