The ECA is an active member of INTOSAI and its European regional group (EUROSAI). Through this activity, it contributes to the development of the public audit profession worldwide.
INTOSAI (International Organisation of Supreme Audit Institutions) is the professional organisation of SAIs of countries that belong to the United Nations or its specialised agencies. At present, it comprises 195 full members (of which the ECA is the only supranational body), five international organisations with associate membership, and one affiliate member. INTOSAI is listed as a support organisation of the United Nations.
Since 1980, and even before becoming a full member, the ECA has actively participated in a number of INTOSAI activities and work streams, in particular providing practical input to the preparation of standards and guidance, as well as promoting best practice and quality assurance. The ECA has also attended each triennial INTOSAI congress, on many occasions taking responsibility for a congress theme.
In 2004, the ECA became a full member of INTOSAI following the modification of the INTOSAI statutes concerning the membership of SAIs from supranational organisations.
In 2016, after many years of involvement in the subcommittees on financial, compliance and performance audit, the ECA was appointed Vice-Chair of the INTOSAI Professional Standards Committee.
The ECA is also a member of the INTOSAI Capacity Building and Knowledge Sharing Committees, and plays an active role in several of these Committees' working bodies.
The ECA is a member of EUROSAI (European Organisation of Supreme Audit Institutions), the European regional group of INTOSAI. EUROSAI was established in 1990 by 29 European SAIs and the ECA and currently comprises 50 members. Since its foundation, the ECA has been engaged intensively in various EUROSAI working bodies.
The ECA served as the EUROSAI external auditor for the period 2008-2011 and as a member of the EUROSAI Governing Board for the period 2011-2017.