UEN is a multi-agency initiative aiming to develop ONE Number that enables entities' convenient interactions with government agencies.
This initiative is co-led by the Ministry of Finance (MOF) and the Accounting and Corporate Regulatory Authority (ACRA).
Before UEN was introduced, entities have to use different identification numbers when interacting with different public sector agencies. The more commonly used numbers include Accounting and Corporate Regulatory Authority (ACRA) Registration Numbers issued to businesses, local companies, and limited liability partnerships; Registry of Societies (ROS) numbers issued to societies; Central Registration (CR) numbers issued by the Department of Statistics (DOS) for survey or statistical purposes; and CPF Employer Reference Number (ERN) issued to all employers by the Central Provident Fund Board (CPFB).
The Ministry of Finance (MOF) led a multi-agency study from March 2005 to February 2006 to examine if and how UEN could be issued to entities in Singapore. A public consultation was also conducted from December 2005 to January 2006 to seek suggestions and feedback from different entity types and members of the public.
UEN was implemented on 1 January 2009.