How to look up a Vietnam business-registration number (MST) — and what to check
Updated: 2026-06-19 · KVBiz
What a Vietnam business-registration number (MST, Mã số thuế) is, where to look it up, and what to check in the result. The first step in verifying a Vietnamese counterparty.
Key takeaways
- MST (Mã số thuế) is Vietnam's business-registration number — a 10-digit (13 for branches) number assigned to every company and sole proprietor.
- Search by MST or company name on the national portal and the tax authority to see name, address, operating status and legal representative.
- When you look it up, always check the name/address match your trade documents and that the operating status is "normal".
What is an MST (business-registration number)?
MST (Mã số thuế) is the tax / business-registration number assigned to every company and sole proprietor in Vietnam. It is usually 10 digits; branches add 3 more for 13 digits.
It plays a role similar to Korea's business-registration number and is the most basic identifier for verifying a Vietnamese counterparty.
Where to look it up
- National Business Registration Portal (dangkykinhdoanh.gov.vn): free public name, enterprise code, address, business lines, legal representative and legal status
- General Department of Taxation (tracuunnt.gdt.gov.vn): tax-registration status (whether actively operating)
Both are in Vietnamese and can be cumbersome to query from Korea (captchas etc.). The KVBiz counterparty due-diligence tool presents this in Korean.
What to check in the result
- Name/address match: same as the contract or invoice you received
- Operating status: "actively operating", not suspended/closed/tax-halted
- Legal representative: matches your counterparty
- Business lines: the actual goods fall within the registered scope
- Incorporation date / capital: age and size appropriate for the deal
Points to note
Registration data only tells you the company exists — it does not guarantee trade reliability or financial health.
For large deals, add account-name matching, fraud-signal review and a video meeting on top of the registration check.
Verify a Vietnamese counterparty in Korean
Enter a company name or MST and get the key registration facts, laid out clearly.
FAQ
› Are the MST and the business-registration number the same?
Yes. MST (Mã số thuế) is Vietnam's business-registration / tax identifier, similar in role to Korea's business-registration number.
› Can I look it up with only the company name?
You can search by name on the national portal, but identical/similar names are common, so pinpointing by address or MST is more accurate.
Related guides
※ Reference based on public information, not legal advice. KVBiz · Transflash