Tax Identification Number, TIN) is A unique number assigned by each country or region to identify taxpayers.(Article 30 of the “Implementation Regulations for Automatic Exchange of Encrypted Asset Information in accordance with the Information Exchange Agreement”).
In Korea, the resident registration number for individuals and the business registration number for organizations and corporations perform the same function as the taxpayer number. Detailed information on each country's tax number system and format can be found on the OECD Automatic Information Exchange portal.