Validate Vendor Identity Before the Payment. Not After the Penalty.
Validate a vendor's tax identity, screen them against global watchlists, and collect the W-9 — in one call, on one record. Every capability is in every plan, from $20 a month.
Powerful Features
Everything you need to succeed, all in one powerful platform
IRS TIN Matching
Instantly verify TINs and names against IRS records to reduce errors, avoid B-Notices, and stay tax compliant.
Request W-9 Forms
Use W-9 Management to send a secure link, collect signatures, and store completed W-9s.
Lightning Fast API
Experience blazing-fast performance with our optimized infrastructure designed for speed and reliability.
Managed Services
Let our team handle vendor data remediation, IRS notice workflows, W-9 collection, and penalty support end-to-end.
Sanctions & OFAC Screening
Screen individuals and businesses against OFAC, AML, and global sanctions lists to minimize compliance risk.
Bulk File Processing
Upload and process large files at once for fast, high-volume TIN and EIN verification.
AI Connections
Plug TIN Comply into Claude, ChatGPT, and other AI assistants via our MCP server so your team can run validations and screenings in agentic, natural-language workflows.
Detailed Reporting & Audit Trails
Access full validation histories so you can easily review results, support audits, and demonstrate compliance to regulators.
EIN & Company Lookup
Quickly discover the correct Employer Identification Number (EIN) for a business name-and vice versa-so you always engage with accurate entity information.
Company Details Lookup
Verify a business by legal name or by address across millions of US companies — and see every business registered at an address, or none at all, which tells you something too.
Address Validation
Standardize and verify every payee address against USPS records before a B-Notice or 1099 goes out, with ZIP+4, county, and a plain-English reason for anything that fails.
FATCA GIIN & LEI Validation
Check a GIIN against the IRS FFI list and an LEI against the GLEIF register — the entity identifiers FATCA reporting and KYC review depend on.
Resolve IRS TIN Mismatches Fast
with Automated W-9 Requests
TIN Comply provides automated tools to resolve IRS TIN/Name mismatches by combining real-time validation, EIN discovery, and secure W-9 collection.
1 IRS TIN Matching
Run real-time IRS TIN/Name validation to confirm taxpayer information before payment or 1099 filing.
2 Mismatch Detection & Reporting
Instantly identify invalid TINs, name mismatches, and non-issued results with clear status indicators and audit history.
3 EIN Discovery
Search for missing or incorrect EINs to help correct records without manual research or vendor outreach.
4 Secure W-9 Request Portal
Send W-9 requests with electronic signature, status tracking, and secure storage of completed forms.
When IRS matching fails, send a W-9 request instantly and track completion in one dashboard.
Customer Outcomes
Real results, real compliance teams
Gig Economy / Payroll
Contractor Platform Eliminates Year-End TIN Scramble
The Challenge
With thousands of new contractors onboarded monthly, the team discovered TIN errors only at 1099 time requiring expensive emergency remediation every January.
TIN validation now runs at onboarding, not at filing
97% reduction in year-end mismatch corrections
Sanctions screening added with no additional integration work
Accounts Payable
Mid-Size Manufacturer Clears 5,000-Vendor Backlog
The Challenge
After an ERP migration, the AP team discovered thousands of vendor records with inconsistent names, missing EINs, and no W-9 documentation. Filing season was 90 days away.
5,200 vendor records cleaned and validated in 3 weeks
94% W-9 collection rate via managed outreach
Zero CP2100 notices the following filing season
Tax & Compliance
Regional Bank Automates Pre-Payment TIN Validation
The Challenge
The compliance team needed to validate vendor TINs before ACH payments were released without slowing down the payment cycle or adding manual review steps.
API integrated into payment workflow in 2 days
Mismatched payees automatically routed to exception queue
Audit trail satisfies internal controls review quarterly
Every capability, in every plan
Plans differ by volume and seats — not by features. Nothing is locked to a higher tier.
Managed Compliance Services
Let our team handle vendor data remediation, IRS notice workflows, W-9 collection, and penalty support end-to-end — delivering audit-ready documentation, cleaner records, and fewer compliance surprises.
Full-Service W-9 Outreach
Upload your vendor list and we manage secure W-9 collection, reminder workflows, validation, and audit logging — with optional physical mailing for non-responsive payees.
Vendor Master Cleanup
Clean, standardize, and reconcile vendor data to eliminate duplicates, normalize entity names, correct addresses, and prepare an audit-ready master file for 1099 reporting and compliance.
CP2100 & B-Notice Handling
End-to-end CP2100 remediation including mismatch analysis, First and Second B-Notice workflows, W-9 outreach, and defensible documentation to reduce repeat notice cycles.
972CG Penalty Support
Review IRS penalty assessments, assemble supporting documentation, provide remediation history, and assist with abatement response packages to strengthen your defense.
Trusted by Finance & Compliance Teams
What our customers say
We had over 8,000 vendors and were drowning in TIN mismatches every January. TIN Comply helped us clean the file before filing season. Our CP2100 volume dropped dramatically and the audit trail made our year-end review a non-event.
We received a 972CG penalty notice with a very short window to respond. TIN Comply's managed services team reconstructed our correction history, organized the evidence pack, and helped us build a reasonable-cause response. The process was clear and fast when it needed to be.
We onboard hundreds of contractors a month. Embedding TIN Comply's API into our onboarding flow meant mismatches get caught before anyone gets paid and not after we've filed 1099s. The documentation was clean and the integration was genuinely fast.
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