nadležni organ

1. formal (in official usage) competent authority; relevant authority
   Zahtev se podnosi nadležnom organu u mestu boravka. — The application is submitted to the competent authority where you reside.
   Dokument mora biti izdat od strane nadležnog organa. — The document must be issued by the competent authority.

Common on forms and in laws; the adjective takes za + acc.: nadležan za izdavanje pasoša.