Among the documents created in the field of management, business letter occupies one of the leading places.Many managers have to compile a large number of letters every day. The manual discusses the rules for issuing a business letter in Russia in accordance with GOST R 6.30-2003, standard instructions for office work in federal executive bodies, approved by order of the Federal Archives of 27.11.2000 No. 68 and registered with the Ministry of Justice of the Russian Federation of 26.12.2000 No. 2508, and the rules for issuing an international letter, which are developed by national standardization services within the framework of ISO. Particular attention is paid to the text of the letter, examples of writing letters to government bodies and various organizations are given.