This paper deals with a Co-60 TLD postal dose quality audit organized by IAEA/WHO year 2018. Three LiF dosemeters contained in plastic capsules were sent to the National Radiation Metrology Laboratory (SSDL Jakarta) as the participating SSDLs to be irradiated under reference conditions with a specified absorbed dose to water. Then, the irradiated dosemeters were sent back to the IAEA to be eval…