https://en.wikipedia.org/wiki/ TARGET2
The business relationships are established between the TARGET2 users and their national central bank. In terms of the value processed, TARGET2 is one of the largest payment systems in the world.
The use of TARGET2 is mandatory for the settlement of any euro operations involving the Eurosystem. The Eurosystem consists of the European Central Bank (ECB) and the national central banks of the 19 European Union member states that are part of the Eurozone.[2] Participation in TARGET2 is mandatory for new member states joining the Eurozone.
https://en.wikipedia.org/wiki/ Sort_code
Sort codes, in the British and Irish banking industries, are bank codes used to route money transfers between banks within their respective countries via their respective clearance organisations. In Ireland, a sort code is known as the NSC or National Sort Code[1] and is regulated by IPSO (Irish Payment Services Organisation).[2] Although sort codes in both countries have the same format, they are regulated by different authorities as each country has its own banking system.[3][4]
https://en.wikipedia.org/wiki/ ISO_9362
ISO 9362 defines a standard format of Business Identifier Codes (also known as SWIFT-BIC, BIC, SWIFT ID or SWIFT code) approved by the International Organization for Standardization (ISO). It is a unique identification code for both financial and non-financial institutions.[1] The acronym SWIFT stands for the Society for Worldwide Interbank Financial Telecommunication. The ISO has designated SWIFT as the BIC registration authority.[2] When assigned to a non-financial institution, the code may also be known as a Business Entity Identifier or BEI. These codes are used when transferring money between banks, particularly for international wire transfers, and also for the exchange of other messages between banks. The codes can sometimes be found on account statements.