How to Look Up a Business Registration Number? Methods and Tools

When a company wants to work with a new vendor or partner, the first question is rarely about price. It is about identity: is this business who it claims to be?

A business registration number is one of the most direct ways to answer that. Every registered company receives one from a government authority, and it stays tied to that entity for the life of the business. That number is the starting point, and the verification work begins once you have it. A 2024 Moody's survey of over 300 risk and compliance professionals across 50 countries found that 9 in 10 organizations rate entity verification as essential or important, which reflects how standard this practice has become across industries and deal types.

The challenge is that registration numbers look different depending on where a business is incorporated and which authority issued them. The databases that hold these records are not always consistent or current, and the ACFE estimates that organizations lose around 5% of annual revenue to fraud, much of it tied to weak controls at the point where new relationships begin.

Before we jump to the fix, let's start by understanding what exactly a business registration number is to ensure we are on the same page.

What is a business registration number?

A business registration number is a unique identifier assigned to a legal entity upon incorporation. It confirms the entity's status as a recognized legal structure within a specific jurisdiction.

• In the US, the Secretary of State for the relevant state assigns the registration number. Other countries use a national company registrar or trade register.
• Unlike a tax identification number or EIN, a business registration number relates to legal formation rather than tax obligations.
• Formats differ across countries. UK companies use an eight-digit Companies House number, while Indian businesses receive a 21-character Corporate Identification Number.
• A company operating across multiple countries may hold several registration numbers, each valid only within its issuing jurisdiction.

Why business registration number lookup matters

When engaging a new supplier or prospective partner, confirming registration status is one of the first checks that compliance frameworks require. A registration number lookup gives you a direct, documented way to establish that a business is what it claims to be.

• Regulatory compliance: Financial institutions and regulated businesses must verify the legal status of counterparties as part of AML and KYB obligations.
• Fraud and counterparty risk: Fraudulent businesses often appear legitimate at first contact. A registration lookup surfaces discrepancies in entity names and filing records before a relationship is formalized. The ACFE's 2024 Report to the Nations estimated that organizations lose 5% of annual revenue to fraud, with weak or absent verification controls cited as a leading factor in how those schemes take hold.
• KYB requirements during onboarding: Many compliance programs require verified business identity as a prerequisite for account opening or contract execution.
• Audit trail needs: A documented registration check creates a verifiable record that supports regulatory review and internal audits.

With those requirements in mind, the question becomes where and how a registration number lookup actually gets done.

How to look up a business registration number

Looking up a business registration number involves several distinct sources, and the right starting point depends on where the company is incorporated.

Method #1: State Secretary of State databases

In the US, most business entities register at the state level. Each state maintains a publicly accessible database through its secretary of state website, searchable by business name or entity number. These searches are free and typically return the entity's legal status and formation date, along with the registered agent on file. Start here when verifying any US-incorporated company.

Method #2: Federal and regulatory databases

Some US entities are registered at the federal level or with sector-specific regulators. For companies in regulated industries, federal databases add verification detail that state records cannot provide on their own.

• The SEC's EDGAR system covers publicly traded companies and investment funds, with financial filings going back decades.
• The Financial Crimes Enforcement Network maintains a beneficial ownership registry with data on certain privately held entities.

Method #3: International business registries

For businesses incorporated outside the US, each country maintains its own registry, with varying levels of public access.

• UK: Search Companies House at companies.gov.uk using the company name or registration number to access filings and director information.
• EU: Use the European Business Register network or the national registry of the relevant member state.
• India: Search the Ministry of Corporate Affairs portal at mca.gov.in using the company name or Corporate Identification Number.
• Australia: Use ASIC Connect to search the Australian Securities and Investments Commission's company register.

Method #4: Business credit bureaus and commercial data providers

Commercial data providers aggregate registration information from multiple registries into a single searchable platform. Firms like Dun & Bradstreet and Bureau van Dijk cover millions of entities worldwide. Their databases go beyond basic registration data to include ownership structures and credit history. These platforms suit teams that need verified business data at volume rather than one-off database searches.

Method #5: Automated business verification platforms

Purpose-built verification platforms connect to government registries and commercial databases through a single API. Compliance teams can submit a business name or identifier and receive structured results in under 60 seconds, rather than navigating multiple databases manually.

"A supplier we were close to signing with passed our initial name check, but showed a dissolved entity status when we ran it through Signzy. That would have been an expensive mistake to catch later." — Procurement Risk Manager, Manufacturing Conglomerate.

These platforms also generate audit logs automatically, supporting regulatory review without additional overhead.

Here’s how it works:

1. Submit the business identifier: Enter the company name, registration number, or tax ID through the platform interface or API. The platform determines the relevant jurisdiction and routes the query to the appropriate registry or data source.
2. Query multiple sources simultaneously: The platform pings government registries and commercial databases in parallel, covering the entity's country and state of incorporation. This removes the need to visit each registry individually or manage separate logins.
3. Normalize the returned data: Raw registry data varies by country in structure and format. The platform standardizes the output into a consistent schema, making it straightforward to compare or process results across jurisdictions without manual reformatting.
4. Receive structured verification results in under 60 seconds: The completed result covers entity status, registered address, officer names, filing history, and available UBO data. For most jurisdictions, the full result is returned in under 60 seconds from the point of submission.
5. Review flagged risk signals: The platform automatically surfaces discrepancies such as a dissolved entity status, a name mismatch between submitted and registry data, or a flagged beneficial owner. These are presented for human review before a final decision is made.

Log the check automatically: Every verification run is recorded with a timestamp and outcome, creating an audit trail that supports compliance review, internal audits, or regulatory examination without any manual documentation.

What does a business registration number reveal?

A business registration number does more than confirm that a company exists. The record attached to it contains a range of details that matter for due diligence and risk assessment.

• Legal entity status: whether the business is currently active or has been removed from the register.
• Registration date: the date the entity was formally incorporated or first registered.
• Registered address: the official address on file with the issuing authority at the time of registration.
• Business type: the legal structure of the entity, such as a limited company or corporation.
• Officer or director names: the individuals listed in official filings as directors or officers.
• Filing history: documents submitted to the registry over time, including annual returns and amendments.

Knowing what a lookup can surface also means understanding where the process can fall short.

Limitations of manual registration number lookups

Public registries are a useful starting point, but manual lookups have real limits that become more pronounced at scale or across borders. Four challenges in particular trip up compliance teams that rely on manual processes.

Registry formats vary too much to compare reliably

No two registries structure their data the same way. Registration identifiers differ by jurisdiction: the UK uses an eight-digit Companies House number while India issues a 21-character Corporate Identification Number. Within the US, each secretary of state database stores entity information in its own format, with no universal schema across all 50 states.

A compliance team cannot run the same query against two registries and expect results in a comparable format. Merging data from multiple sources requires manual normalization at every step. A company may appear under a slightly different name in each jurisdiction, making cross-referencing without automation slow and error-prone. The larger the counterparty's footprint, the harder this becomes.

This is not just an enterprise problem. Founders building platforms that onboard businesses run into the same wall early. One founder put it on Reddit:

"100s of those who register online will definitely cause issues... what third-party company should we go for that won't milk us but only charge minimal and has a legitimate past."

Manual works for a handful. It breaks the moment volume arrives.

Records can be weeks or months behind real-world changes.

Registries record what companies report, and companies are not always prompt. Most US states require annual reports once a year. A company's registered address or ownership structure can be up to 12 months out of date and still be technically compliant. In other jurisdictions, processing lag within the registry adds further delay on top of any filing window.

Industry research on business data decay estimates that roughly 30 percent of company information becomes inaccurate within a year. For a manual lookup, the record being reviewed may reflect what a company looked like several months ago. An entity in good standing at onboarding may have been struck off or changed ownership since. None of that would appear in a point-in-time registry check.

Cross-border checks have no single source of truth

Verifying a business that operates across multiple countries means accessing distinct registries, each with its own access model and filing format. Some are fully public. Others require paid subscriptions or formal data requests. A manual cross-border check covering a company's full legal structure can take days and still leave gaps.

The United Nations Office on Drugs and Crime estimates that global money laundering amounts to between two and five percent of world GDP annually. Shell company structures spanning multiple jurisdictions are frequently at the center of those schemes, built deliberately to exploit gaps between registries. Following an ownership chain across multiple countries requires specialized knowledge of each registry system. Most manual checks do not go that deep before time runs out.

Name mimicry slips past manual review.

Fraudulent entities often register under names that closely resemble legitimate businesses, using substituted characters or spelling variations that are easy to miss. A specific tactic relies on homoglyphs: characters from different alphabets that look identical in standard fonts. A Cyrillic "а" and a Latin "a" are visually indistinguishable in most document viewers.

The same applies to a lowercase "l" and an uppercase "I" in sans-serif typefaces.

A Trulioo survey found that close to four in five companies had experienced some form of business identity theft. That figure reflects how consistently fraud finds its way past manual processes. When processing a high volume of verifications, a name that is 98 percent correct is unlikely to trigger a flag without automated character-level comparison.

The problem is not limited to manual processes. Even purpose-built verification tools can miss the mark at scale. One CTO at an enterprise company noted in a verified G2 review of a widely used platform: "3 people on my team tried verifying with 5 IDs each, and it simply would not work." When verification tools fail at volume, the gap that manual checks leave open does not automatically close.

How can Signzy automate business registration verification?

Manual business registration verification is workable for occasional lookups, but it breaks down quickly when verification volumes increase or counterparties span multiple jurisdictions.

“32% of respondents view KYC automation as transformational — fundamentally changing how verification works — while another 34% see it as significantly improving compliance and customer experience. Together, that is nearly two thirds of the market acknowledging automation is no longer optional.” — Gartner's 2024 Market Guide for KYC Platforms for Banking.

Compliance teams end up navigating disparate databases when they should be assessing risk. Here are three ways Signzy changes that.

1. Real-time verification across 180-plus countries

Signzy's KYB verification API connects directly to business registries and commercial data sources across 180-plus countries. Rather than navigating each country's individual registry manually, compliance teams submit a business name or registration number and receive structured results in near real time.

For example, if a procurement team needs to verify a vendor registered in Germany, Singapore, or Brazil, the API routes the query to the appropriate registry and returns entity status, registered address, and officer details in a consistent format.

There is no need to create accounts on foreign government portals or translate registry documents.

UBO check and entity database verification in one workflow

A basic registration lookup confirms that a business exists. Signzy goes further by combining registration verification with UBO check and database check in a single workflow. This matters because fraudulent entities often pass a surface-level registration check but fail when ownership structures are examined.

"We caught a registration number that looked correct on the surface but returned a name mismatch when verified against the actual registry. Out of roughly 500 verifications that month, Signzy flagged 11 discrepancies our manual process would have missed entirely." — Fraud Risk Analyst, B2B Marketplace

As part of the same workflow, Signzy can return:

• UBO data: The ultimate beneficial owners behind the registered entity, including ownership percentages and control structures
• Database check results: Cross-referenced against commercial data sources to validate the entity beyond what government registries hold
• Risk signals: flags for dissolved status, name mismatches, or discrepancies between submitted information and registry records

This removes the need to run separate checks through different platforms and reconcile results manually.

Onboarding automation with a built-in audit trail

For compliance teams onboarding large volumes of business clients, manual verification is a bottleneck. Signzy's platform lets teams configure the full verification workflow, embedding registration checks, UBO verification, and risk scoring directly into the onboarding journey.

Every check is logged automatically with a timestamp, creating an audit record that satisfies regulatory review without additional documentation. For example, if a financial institution is examined by a regulator and asked to demonstrate how a particular counterparty was verified, the audit log shows exactly when the check ran, what data was returned, and how the outcome was recorded.

Book a demo to see how Signzy fits into your verification process.