Understanding KYB: Why Every B2B SaaS Needs a Know Your Business Checklist
If you're running a B2B SaaS startup that serves business clients across the EU, you've likely encountered the term KYB—Know Your Business. While it shares DNA with the more familiar KYC (Know Your Customer) processes used in retail banking, KYB is specifically tailored for business-to-business relationships. For startups onboarding corporate clients, implementing a robust KYB know your business checklist isn't just good practice—it's increasingly a regulatory requirement.
Whether you're a fintech platform processing payments, a procurement tool managing supplier relationships, or a service like VerigoPay verifying business solvency, understanding what regulators expect from your onboarding process is essential. This guide walks you through the fundamentals of KYB, the documents you'll need to collect, and how to build a compliant yet efficient verification workflow.
KYB Versus KYC: What's the Difference?
Though often used interchangeably, KYB and KYC serve distinct purposes and involve different verification processes.
KYC (Know Your Customer) focuses on individual identity verification. Banks and financial institutions use KYC to confirm that a person is who they claim to be, typically by checking government-issued ID, proof of address, and screening against sanctions lists. The goal is to prevent money laundering, fraud, and terrorist financing at the individual level.
KYB (Know Your Business) extends these principles to corporate entities. It verifies not just that a company exists, but that it's legitimate, properly registered, and that the individuals representing it have the authority to act on its behalf. KYB processes dig deeper into corporate structure, beneficial ownership, and the commercial reality of the business relationship.
Key Differences in Practice
- Scope: KYC verifies individuals; KYB verifies legal entities and their ownership structures
- Documentation: KYC requires passports and utility bills; KYB demands incorporation certificates, shareholder registers, and UBO (Ultimate Beneficial Owner) declarations
- Complexity: KYB often involves layered corporate structures, multiple jurisdictions, and ongoing monitoring of corporate changes
- Regulatory drivers: KYC stems primarily from AML directives; KYB additionally responds to procurement regulations, sanctions compliance, and emerging frameworks like the EU's Corporate Sustainability Due Diligence Directive (CSDDD)
For B2B SaaS startups, the distinction matters because your compliance obligations depend on your business model, transaction volumes, and the jurisdictions where you operate. A payment processor faces stricter requirements than a project management tool, but both need some level of business verification.
What Regulators Expect: The KYB Know Your Business Checklist Framework
Regulatory expectations vary by sector and geography, but several EU directives shape KYB requirements for B2B platforms. The Fifth and Sixth Anti-Money Laundering Directives (5AMLD and 6AMLD) mandate that businesses identify beneficial owners and assess risk. The Payment Services Directive 2 (PSD2) imposes strict due diligence on payment institutions. Meanwhile, sanctions regimes require screening against EU, UK, and international watchlists.
Here's what regulators typically expect from your KYB process:
1. Company Verification
You must confirm that the business entity is legitimately registered and active. This involves:
- Verifying the company registration number against official registries (Companies House in the UK, the Companies Registration Office in Ireland, KVK in the Netherlands, Infogreffe in France, etc.)
- Confirming the registered address and trading addresses
- Checking the company's current status (active, dissolved, in administration)
- Validating the legal form (Ltd, GmbH, SAS, BV, etc.)
- Recording the date of incorporation and jurisdiction
2. Beneficial Ownership Identification
Under 5AMLD, you must identify any individual who ultimately owns or controls more than 25% of the company or exercises control through other means. This requires:
- Obtaining a register of shareholders or partners
- Identifying natural persons who own more than 25% of shares or voting rights
- Documenting senior managing officials if no individual meets the 25% threshold
- Verifying the identity of these UBOs through KYC checks on the individuals themselves
3. Authorised Signatory Verification
You need to confirm that the person signing up for your service has authority to bind the company:
- Checking the register of directors or managing partners
- Obtaining board resolutions or powers of attorney if the signatory isn't a listed director
- Verifying the identity of the authorised person through standard KYC
4. Risk Assessment and Screening
Regulators expect ongoing due diligence proportionate to risk:
- Screening the company and its beneficial owners against sanctions lists (EU, OFAC, UN)
- Checking for Politically Exposed Persons (PEPs) among UBOs and directors
- Assessing the business sector and transaction patterns for AML risk
- Monitoring for adverse media or reputational concerns
The Essential KYB Document Checklist
Building a practical KYB know your business checklist starts with knowing which documents to collect. Requirements vary by jurisdiction and risk profile, but this framework covers most B2B SaaS scenarios:
| Document Type | Purpose | Where to Obtain |
|---|---|---|
| Certificate of Incorporation | Proves legal existence and registration details | Companies House, CRO, Business Register |
| Memorandum & Articles of Association | Defines company structure and governance | Company records or registry |
| Register of Directors/Managers | Identifies who manages the company | Public registry or company submission |
| Register of Shareholders/UBO Declaration | Identifies beneficial owners | Company records or UBO registry |
| Proof of Registered Address | Confirms official location | Utility bill, bank statement, registry extract |
| VAT Registration Certificate | Confirms tax status and legitimacy | Tax authority or company records |
| Board Resolution/Power of Attorney | Authorises signatory if not a director | Company-issued document |
| Government-issued ID | Verifies identity of authorised signatory and UBOs | Passport, national ID card, driving licence |
| Bank Account Verification | Confirms operational legitimacy | Bank statement or letter |
Jurisdiction-Specific Considerations
Each EU member state maintains its own business registry with varying levels of digitisation and public access:
- United Kingdom: Companies House provides free online access to incorporation certificates, directors, and increasingly UBO information through the People with Significant Control (PSC) register
- Ireland: The Companies Registration Office (CRO) offers online searches, though some documents require payment
- Netherlands: The Kamer van Koophandel (KVK) provides comprehensive company data through its business register
- France: Infogreffe and the Institut National de la Propriété Industrielle (INPI) maintain commercial registry data
- Germany: The Handelsregister is accessible through regional courts and aggregator services
- Belgium: The Crossroads Bank for Enterprises (KBO/BCE) centralises company information
For startups operating across multiple jurisdictions, manually checking each registry quickly becomes unsustainable—which is where automation enters the picture.
Building Your KYB Process Flow
An effective KYB process balances compliance rigour with user experience. Here's a recommended workflow for B2B SaaS startups:
Stage 1: Initial Data Collection
During signup, collect basic company information:
- Company legal name
- Registration number
- Country of incorporation
- Registered address
- VAT number (if applicable)
- Business sector/industry
- Authorised signatory details
Keep this form short to avoid abandonment. You'll gather supporting documents in the next stage.
Stage 2: Automated Verification
Use API integrations or verification services to automatically check:
- Company registration status against official registries
- VAT number validity through VIES (VAT Information Exchange System)
- Initial sanctions screening of the company name
- Credit and solvency indicators (relevant for platforms like VerigoPay)
Automated checks provide immediate feedback and can approve low-risk clients instantly, dramatically improving conversion rates.
Stage 3: Document Upload and Review
For clients that require enhanced due diligence (higher risk sectors, larger transaction volumes, or failed automated checks), request supporting documents:
- Provide a clear checklist of required documents
- Accept common file formats (PDF, JPG, PNG)
- Set reasonable file size limits
- Explain why each document is needed to reduce friction
Review can be manual for early-stage startups, but document verification APIs can extract and validate data from certificates and ID documents as you scale.
Stage 4: UBO Verification
Once you've confirmed the company exists, identify and verify beneficial owners:
- Request UBO declarations or shareholder registers
- Perform KYC on individuals owning >25%
- Screen UBOs against sanctions and PEP lists
- Document the verification in your records
Stage 5: Risk Assessment and Approval
Assign a risk rating based on:
- Jurisdiction (some countries carry higher AML risk)
- Business sector (cash-intensive or high-risk industries)
- Ownership structure (complex or opaque structures warrant scrutiny)
- Transaction patterns (expected volumes and destinations)
- Screening results
Low-risk clients can be approved automatically or with light-touch review. Higher-risk relationships may require senior approval or enhanced monitoring.
Stage 6: Ongoing Monitoring
KYB isn't a one-time exercise. Implement periodic reviews:
- Annual re-verification for low-risk clients
- Quarterly or event-triggered reviews for higher-risk relationships
- Automated alerts for changes in company status, directors, or ownership
- Continuous sanctions screening
Automation Options: Building Versus Buying
For early-stage B2B SaaS startups, the build-versus-buy decision for KYB infrastructure is critical. Here are your main options:
Manual Processes
Best for: Pre-product/market fit startups with fewer than 50 clients
Manually checking registries and reviewing documents works when volumes are low. It's essentially free beyond staff time, and it helps you understand the process before automating. However, it doesn't scale, introduces human error, and creates bottlenecks.
Registry APIs and Data Providers
Best for: Technical teams comfortable with integration
Services like Companies House API (free for UK), Creditsafe, Dun & Bradstreet, and Bureau van Dijk provide programmatic access to company data. You'll need to integrate multiple providers for pan-European coverage, handle rate limits, and build your own workflow logic.
Estimated cost: £100–£1,000+ monthly depending on query volumes and data depth
Specialised KYB Platforms
Best for: Startups prioritising speed to market and compliance
Platforms like Onfido for Business, Trulioo Business Verification, and Sumsub offer end-to-end KYB workflows with multi-jurisdiction coverage, document verification, UBO checks, and sanctions screening in a single integration.
Estimated cost: £2–£10 per verification, with volume discounts
These solutions reduce engineering effort and compliance risk but introduce vendor dependency and per-transaction costs.
Hybrid Approach
Many successful B2B SaaS companies use a tiered strategy:
- Automated registry checks for all clients
- Manual document review for mid-tier risk
- Full platform verification for high-risk or high-value relationships
This optimises for both cost and compliance.
Common Pitfalls and How to Avoid Them
As you implement your KYB know your business checklist, watch out for these frequent mistakes:
Over-collecting data upfront: Asking for everything during signup kills conversion. Collect the minimum needed to verify legitimacy, then request additional documentation based on risk assessment.
Ignoring user experience: Compliance doesn't have to mean clunky. Explain why you need information, provide clear instructions, and show progress indicators. Companies that make KYB painless gain competitive advantage.
Treating KYB as one-and-done: Corporate structures change. Directors resign, ownership transfers, companies are acquired. Build periodic re-verification into your process.
Inconsistent application: Regulators expect you to apply KYB consistently. Document your risk-based approach and apply it uniformly to similar clients.
Poor record-keeping: You must be able to demonstrate your due diligence to auditors and regulators. Maintain clear audit trails of what you checked, when, and what you found.
Neglecting cross-border complexity: A German GmbH has different disclosure requirements than an Irish Ltd. Understand the nuances of your target markets or use tools that handle jurisdictional differences.
Getting Started: Your First 90 Days
If you're implementing KYB from scratch, here's a practical 90-day roadmap:
Days 1-30: Foundation
- Document your current onboarding process
- Identify your regulatory obligations based on your business model and markets
- Draft your KYB policy defining risk categories and verification requirements
- Create your document checklist for each risk tier
- Select 2-3 verification providers to evaluate
Days 31-60: Implementation
- Build or integrate basic company registry checks
- Design your onboarding flow with progressive data collection
- Create document upload and review workflows
- Implement basic sanctions screening
- Train your team on review procedures
Days 61-90: Refinement
- Test the full workflow with pilot clients
- Measure completion rates and identify friction points
- Refine automation rules based on real data
- Document your procedures for audit purposes
- Establish ongoing monitoring cadence
For B2B SaaS platforms operating across the EU, robust KYB processes aren't optional—they're table stakes. The good news is that the right approach to Know Your Business verification protects your company from regulatory and reputational risk while actually improving the quality of your client relationships.
Whether you're verifying solvency like VerigoPay or onboarding clients for any B2B service, investing in proper KYB infrastructure early pays dividends as you scale. Start with a clear checklist, automate what you can, and maintain the flexibility to adapt as regulations evolve.
If you're exploring verification solutions for your B2B platform, see pricing for tools that can streamline your KYB workflow while ensuring compliance across EU markets.