This master's thesis analyzes civil registers through a comparative analysis of documents from the Russian and Croatian administrative systems. The first part of the thesis provides a theoretical overview of key concepts in translation studies, translation classifications and types, as well as characteristics of administrative writing style. The importance of the topic is emphasized in light of the war in Ukraine and other negative political processes involving the Russian Federation and other countries which also affect Croatia, at the same time increasing the need for official translations of Russian legal documents. The second part of the thesis presents legal regulations, definitions and other directives related to civil registers, their registration, certificate issuance and a list of documents they include. A comparative analysis of three documents common to both the Croatian and Russian systems demonstrates similarities and differences in these documents, particularly on the level of structure, form, vocabulary, syntax and stylistic features. The Croatian documents analyzed and compared with their Russian equivalents are birth, marriage and death certificates. Additionally, four documents common exclusively in the Russian system are analyzed (свидетельство о расторжении брака, свидетельство об усыновлении (удочерении), свидетельство об установлении отцовства, свидетельство о перемене имени). Furthermore, the thesis discusses potential challenges in translating documents from the civil registers and explores the role of the translator in this process.