W-9 Forms API
API Docs https://api.veryfi.com/api/v8/partner/w9s
W-9 - Extract data from W-9s and import the details into your software or flow
Key advantage: AI-powered extraction without templates or humans-in-the-loop.Veryfi “understands” W-9s and pulls data automatically.
Main use cases for W-9 Processing
Vendor onboarding
Challenge: Collecting and manually entering W-9 data for many vendors is slow, error-prone, and costly.
Benefit: Automatically capture W-9 data in seconds, with higher accuracy than manual entry. Reduces data-entry time and errors, speeding up vendor setup and payments.
KYC/KYB for loans or bank accounts
Benefit: Streamline KYC workflows by quickly extracting W-9 data to verify payee status and tax information, supporting faster onboarding for lending or account opening.
What data fields are in W-9 forms?
W-9 data is surfaced as structured fields in the API response.
Payee name and business name
Address information (street, city, state, ZIP)
Tax identification (TIN, such as SSN or EIN)
Entity classification (individual, LLC, C corp, S corp, partnership, etc.)
Exemption codes and related descriptions
Additional form details (box statuses, requester information, signature/date)
Please check Veryfi API Docs for more details.
How to process W-9 forms?
User-friendly way:
Go to Veryfi Web Portal > Inboxes> W-9
Press Collect or simply Drag & Drop a W-9 sample
Open the processed Form and see the extracted information in Document Details
Interactive API inside API Doc OR Postman
API Docs Interactive part should hook up your credentials and allow you to emulate different types of API calls using request parameters e.g, confidence details or request to parse address
Implementation Hints & Ideas
Provide a single endpoint to upload all KYC/KYB documents
Use Veryfi Classify API to classify submitted forms
Use Veryfi Workflows to route requests to the appropriate Veryfi APIs
Tax Forms & Accounting
Q: How can tax preparers use the Classification API?
A: Upload all client tax documents to the Classification API first, then route them automatically:
Documents classified as
w2→ W-2 Processing APIDocuments classified as
w9→ W-9 Processing APIDocuments classified as
w8→ W-8 Processing APIDocuments classified as
receipt→ Receipts APIDocuments classified as
other→ Manual review queue or special handling
Financial Services & KYC
Q: How does the Classification API help with KYC (Know Your Customer) processes?
A: Create a single document upload endpoint for customers, then route based on classification:
bank_statement→ Bank Statements API for account verificationcheck→ Checks API for payment verificationbusiness_card→ Business Cards API for contact extractionBank letters/official documents → Any Document API with custom templates
other→ Fraud review or rejection workflow
Compliance Benefits:
Faster customer onboarding
Reduced manual document review
Consistent compliance workflows
Audit trail for document classification
Q: Can I integrate the Classification API with compliance workflows?
A: Yes, use Business Rules Engine to create automated compliance checks based on document types and confidence scores.
Learn more about KYC Toolkit at Veryfi
Have any questions? Please reach out to us at [email protected]