UEN (Unique Entity Number)
The UEN (Unique Entity Number) is the standard identification number for every entity registered in Singapore, such as companies, businesses and LLPs.
Every registered business, company, limited liability partnership and society in Singapore has a UEN. It has been in use since 2009 and stays with the entity for life, even if it changes its name, address or directors.
UENs come in three formats, each ending with a check letter:
| Entity type | Format | Example |
|---|---|---|
| Businesses registered with ACRA, such as sole proprietorships | 8 digits + letter | 53123456K |
| Local companies registered with ACRA | Year + 5 digits + letter | 201512345A |
| Other entities, including LLPs | Prefix + year + type code + 4 digits + letter | T24LL0230H |
For local companies, the first four digits are the year of incorporation.
Why it matters in sales: a UEN proves a company is real, tells you how established it is, and is the most reliable key for de-duplicating accounts and matching lists. You can look one up for free at uen.gov.sg.
Source: UEN, uen.gov.sg
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