Unified Business Number lookup: confirm the invoice title and registration status before invoicing
What this tool does
Enter an 8-digit Unified Business Number and this tool queries both the Ministry of Finance business (tax) registration data and the Ministry of Economic Affairs company/business registration data, showing the name, type of organization, whether it uses uniform invoices, the city/county and township/district, and the registration status as originally worded. It is useful for checking that the invoice title is not mistyped before you issue an invoice. Finding a UBN does not mean the business qualifies as an importer, and it cannot be used to verify anyone's real-name identity.
Last updated: 2026-09-25 | Data sources and lookup notes compiled from official pages accessed on 2026-09-25
UBN lookup tool
Understanding the results
- Name: the registered name in the Ministry of Finance tax registration and in the Ministry of Economic Affairs registration respectively. When issuing an invoice, use the full name provided by the other party or shown in the official lookup as the title.
- Type of organization: copied from the “organization type name” in the Ministry of Finance tax registration data, e.g. limited company or company limited by shares.
- Uses uniform invoices: copied from the “uses uniform invoices” field in the Ministry of Finance tax registration data; “No” means the business is registered as not using uniform invoices.
- Area: shows only the city/county and township/district. The full address is not shown on this page; use the official lookup if you need it.
- Registration status: copied as originally worded in the Ministry of Economic Affairs commerce and industry registration data (e.g. “approved for establishment”); this site does not rewrite or interpret it.
- Not found at the Ministry of Finance: the Fiscal Information Agency, Ministry of Finance, states in its dataset description that the open business (tax) registration data covers only businesses currently operating; for non-profit organizations, use the Ministry of Finance “Public Information Inquiry for Non-profit Organizations” instead. Not finding a record does not mean the UBN is invalid.
- Temporarily unavailable: means the government system is busy or timed out, or this site has paused lookups to protect the system; it does not mean no record exists.
When you need it
Confirming the title before issuing a triplicate invoice or an invoice with a UBN
Checking the name by UBN before issuing reduces title errors. For how invoices are issued and what to watch for when adding a UBN, see the e-invoice guide.
Businesses importing from mainland China via consolidation
When importing in a company's name, the company name and UBN on the customs data must both be filled in correctly. For the key points on business tax, import duty and formal declaration, see the import tax guide for businesses.
Getting an initial picture of a counterparty's registration status
Before paying or signing, you can check the other party's registration status as originally worded. This is only an initial reference and does not constitute any credit or legal judgment.
Limitations and disclaimer
This tool queries public government data in real time. The results are only a reference for confirming the invoice title before issuing an invoice and for an initial understanding of registration status, and do not constitute any legal, tax or credit opinion. Finding a UBN does not mean the business qualifies as an importer or that it has mandated or authorized anyone to handle customs declarations, and it cannot be used to verify anyone's real-name identity. The official systems of the Ministry of Finance and the Ministry of Economic Affairs prevail. This site does not display information on responsible persons or natural persons.
This site does not record which user looked up which UBN; to reduce the load on government systems, lookup results are cached on this site temporarily (up to 7 days) and then deleted automatically, and logs keep only masked numbers.
This tool does not offer reverse lookup by name, address lookup, batch lookup or responsible-person data; the number of lookups per minute and per day from the same source is limited.
FAQ
If a UBN is found, does that mean the company is still operating?
You cannot necessarily conclude that. The “registration status” in this tool is copied as originally worded from the Ministry of Economic Affairs commerce and industry registration data (e.g. “approved for establishment”), and the tax registration data comes from the open business (tax) registration data of the Fiscal Information Agency, Ministry of Finance. Whether it is still operating should be confirmed by the “Public Inquiry of Tax Registration Data” on the Ministry of Finance eTax Portal and the official lookups of the Ministry of Economic Affairs.
Why can't a UBN be found?
There are three common reasons: first, the number was mistyped (this tool validates the check digit before submitting); second, the Fiscal Information Agency, Ministry of Finance, states in its dataset description that the open business (tax) registration data covers only businesses currently operating, so businesses that have suspended or ceased operations may not be found; third, for a sole proprietorship/partnership, the registration city/county must be specified to find the Ministry of Economic Affairs business registration. Not finding a record does not mean the UBN is invalid.
Why do I have to select a city/county for a sole proprietorship/partnership?
In the development guidelines of the Ministry of Economic Affairs commerce and industry open data platform, business registration queries require both the “business UBN” and the “business registration authority code”, whereas company registration needs only the UBN. So when looking up a sole proprietorship/partnership, you must first select the city/county government where it is registered to get the correct data.
If a UBN is found, can I import or handle customs declarations in that company's name?
You cannot conclude that. This tool only shows public government registration data; it cannot determine whether the other party qualifies as an importer or has mandated or authorized others to handle customs declarations, and it cannot be used to verify anyone's real-name identity. For the tax and customs key points for businesses importing from mainland China, see the import tax guide for businesses.
Does this site keep the UBNs I look up?
This site does not record which user looked up which UBN; to reduce the load on government systems, lookup results are cached on this site temporarily (up to 7 days) and then deleted automatically, and logs keep only masked numbers. This tool requires no login and does not display responsible-person data.
How do I look up the UBN of a non-profit organization?
The Ministry of Finance eTax Portal has a separate “Public Information Inquiry for Non-profit Organizations” that can be searched by UBN. This tool only covers business tax registration and Ministry of Economic Affairs company/business registration, so non-profit organizations may not be found here.
What does “Uses uniform invoices: No” in the results mean?
The Ministry of Finance business (tax) registration data has a “uses uniform invoices” field, which this tool copies as is. “No” means the business is registered as not using uniform invoices; if you need them to issue a receipt or invoice, you can first confirm with them how it will be issued.
Official lookups
Data sources and licensing
- Fiscal Information Agency, Ministry of Finance, “Business (Tax) Registration Data” (dataset on the Government Open Data Platform)
- Administration of Commerce, Ministry of Economic Affairs, “Commerce and Industry Open Data Platform” (development guidelines)
The data above is used under the Open Government Data License, version 1.
Further reading
- Can consolidation services issue invoices? UBN, carriers and proof copies for e-invoices
- How do I know if my consolidation invoice won a prize? Checking and claiming
- Business imports: a guide to business tax, import duty and formal declaration
- How to read an import declaration: fields explained and business tax payment certificate credits
- How to read a customs duty bill: import tax documents explained
- What if your company's customs data is misused? Impersonated declaration cases and self-protection
- Import duty calculator: customs duty, business tax and commodity tax in one estimate
Is your business importing from mainland China via consolidation?
First confirm the invoice title and UBN, then check the key points on import tax and customs declaration.
Read the business import guide E-invoice guide