This publication contains the OECD's standardised IT-format for providing structured feedback on exchanged Common Reporting Standard (CRS) information – the CRS Status Message XML Schema – as well as the related User Guide. The first and current 2017 version of the CRS Status Message Schema and User Guide is applicable for all exchanges until 31 December 2020, whereas the second, the new June 2019 version will be in use as from 1 February 2021.