Glossary

Page's last update : 10 Apr 2026

Please find below some useful vocabulary and acronyms you can find on eFile and on our Wiki:

Home page

A

ACD

The Administration des Contributions Directes The Luxembourg Tax authority.

This is the recipient of CRS and FATCA reporting

AIF

The Alternative Investment Fund (AIF) is a type of investment vehicle regulated under the AIFMD framework.

AIFM

The Manager of an Alternative Investment Fund (AIF) under the AIFMD framework.

B

BCL

The Central Bank of Luxembourg (BCL) is Luxembourg’s monetary authority and a member of the Eurosystem and the European System of Central Banks.

C

CBDF

The ‘Cross Border Distribution Framework’ (CBDF) is a piece of legislation issued by ESMA with an original effective date of August 2021.

The purpose is to establish a harmonised approach to distribution rules from EEA country to EEA country with less barriers to entry.

On eFile there is a dedicated module UCITS Cross-border Notification

Certificate

As a secure channel, eFile needs a secure way to transmit reports and documents to regulators.

A Luxtrust SSL certificate is required to encrypt documents before sending to Lux regulators.

This certificate is stored in the keystore

CSSF

The Commission de Surveillance du Secteur Financier is a public institution which supervises the professionals and products of the Luxembourg financial sector.

CRS

The Common Reporting Standard (CRS) is a global regulation developed by the OECD for the automatic exchange of financial account information between countries to combat tax evasion. It requires financial institutions to identify foreign tax residents and report their financial account details to local tax authorities, who then share this data internationally.

The local tax authorities in Luxembourg processing such reports is the ACD - Administration des contributions directes

F

FATCA

FATCA (Foreign Account Tax Compliance Act) is a US law requiring foreign financial institutions, including those in Luxembourg, to report information about financial accounts held by U.S. persons to local tax authorities ( ACD - Administration des contributions directes). The ACD then automatically exchanges this data with the US IRS to prevent tax evasion.

K

Keystore

The keystore is a file containing the Luxtrust certificate.

This allow encryption and decryption of files to communicate with Lux regulators

The keystore contains historical certificates to enable decryption of old filing

S

Sending Service

The Sending Service is our solution for the automatic transmission of reports and documents to the authorities, by a simple deposit of files in a designated directory.

It is particularly interesting for sending many documents.

SSO

The Single Sign-On (SSO) aims to ease your user experience and the reinforce the security (with the introduction of MFA)

For now, this feature is only suitable for human users (who needs to access the portal), Sending Service accounts can't used such feature.

It allows you to log to other FEFI's application and replace the login / password connection method

T

Transmission module

The Transmission Module is the module to encrypt and send documents to Lux regulators such as CSSF, BCL....

The module needs the keystore to work