The Training Course on "Quality Control of Registers" was held by Ms. Marjan Nurini and Ms. Asiyeh Rashidinejad, Experts of Statistical Methodology and Sampling Survey Office of the Statistical Centre of Iran in the Statistical Research and Training Centre from 26 to 27 January 2020 for 8 hours. In this Course, the participants were provided with topics such as reviewing of register-based survey, assessment methods of administrative data, assessment of register-based census quality of Austria (2011) and quality indices of business register in Italy and Colombia.