Reporting instructions under Article 37 of the Money Market Funds Regulation

The CSSF informs that it has published on 4 May 2021 a “User guide concerning reporting under Art.37 of the MMFR” and a list of “MMFR Error Codes” on its website:

The purpose of these documents is to provide IFMs with an explanation on recurring problems encountered with the MMFR reporting and the full list of ESMA error messages which are mentioned in the Excel file validation_rules_V06.

The CSSF will update these documents in case of needs.

For any question regarding the reporting instructions please send an email to