The paper considers forms of address found in different types of questions and some types of affirmative sentences. The analysis is based on contexts taken from children’s magazines Yozh (Eng. “Hedgehog”) (1928-1935), and Chizh (Eng. “Siskin”) (1930-1941) which were among of the most significant and original Soviet children’s magazines. Forms of address are a speech element of the new Soviet society that serves to solve a number of pragmatic purposes. The main reason for linguistic attention to forms of address is due to their connection to linguistic reality as a syntactic unit and the extralinguistic reality of social relations. The author puts forward a hypothesis that the forms of address in the contexts under consideration have a special pragmatic function of an evidential marker, i.e. an indicator of the information source. The evidential connotation of the forms of address testifies to the fact that they are used as an indicator of the source of syncretic information whose existence is proved by the social role of the addressee. Except for the notion of the information source, the form of address substantiates the message itself and the type of information. In its turn, the evidential potential of the form of address directly depends on its position within the text and its lexical meaning. In this case, preference is given to socially important lexemes from the topic-specific groups, namely, family, offices and occupations, which - on a larger scale - are a means to realize the cognitive and educational functions of the Soviet children’s magazines, one of whose goals was to adapt children to the new society.