Advanced API Integration: Transform Your Compliance Workflow
Validation at the Point of Entry — Not the Point of Consequence
The reason vendor data quality problems accumulate is that validation happens too late. AP runs a quarterly cleanup. Tax discovers mismatches at Q4. The IRS notifies you of CP2100 notices in the spring. By the time a data quality problem is visible, it's already in a filed return. TIN Comply's API embeds IRS TIN matching, sanctions screening, and EIN lookup directly into the systems where vendor data enters your organization — so bad data is caught before it's written, not after it's filed.
Why the API Changes the Compliance Picture
Portal and bulk file validation are reactive — you run them on data that already exists. The API is preventive — validation runs at the moment data is submitted, before it enters the vendor master, before a payment is queued, before a 1099 is prepared. The difference is whether bad data ever gets written to begin with.
Most TIN mismatch exposure accumulates through a predictable pattern: vendor onboarding without validation, payments made against unvalidated records, 1099s filed with whatever name and TIN are in the system, CP2100 notices arriving months later. Embedding the API at the onboarding event breaks that pattern at the source. Mismatches are caught at submission — the point when the vendor is available, engaged, and in a position to provide corrections — rather than six months later when nobody remembers who onboarded them.
What the API Does
TIN Comply's API is a RESTful interface that returns results in JSON. A single API call can run:
IRS TIN Matching
Submit a name and TIN, receive the official IRS result code — match on SSN, match on EIN, name mismatch, TIN not issued, or match on both. Specific result, not pass/fail. Every call logged per vendor with timestamp.
Sanctions & OFAC Screening
Screen against 250+ global lists — OFAC SDN, OFAC Consolidated, FinCEN, BIS, EU Consolidated, UN Security Council, and more — with fuzzy matching and alias detection. Runs automatically alongside TIN matching in the same call.
EIN & Company Lookup
Look up the entity name associated with an EIN, or find the EIN associated with a company name. Use it to inform correction outreach after a mismatch or cross-reference vendor identity before onboarding.
W-9 Collection Triggers
When a TIN matching call returns a mismatch, the API can trigger automated W-9 correction outreach — sending a targeted request to the vendor with specific correction instructions based on the result code.
How to Get Started
Sign Up
Create your TIN Comply account. No lengthy setup — most teams are making live API calls the same day.
Generate API Keys
Generate API keys from your account dashboard. Create multiple keys for different systems, environments, or teams — each tracked independently in audit logs.
Integrate
Send HTTP POST requests to TIN Comply endpoints with your API key in the header and request body in JSON. Full documentation available in the API Reference.
Validate Live
Validation runs in real time at every onboarding, payment authorization, or correction event your system triggers — with full results and audit logging on every call.
Where Teams Embed the API
The API isn't a single integration point — it's a validation layer that can run at multiple points in the vendor lifecycle wherever your stack allows it.
Vendor Onboarding
Embed in your ERP, procurement platform, or onboarding workflow so TIN matching and sanctions screening run automatically when a new vendor record is submitted. Mismatches surface before the record is created — not after the first payment.
Teams: Procurement, AP, IT
Payment Authorization
Embed in payment release workflows to validate vendor identity before ACH or wire payments are authorized. Catches ghost vendors, mismatched records, and stale sanctions status at the last control point before money moves.
Teams: Treasury, AP, Finance
Bank Account Change Events
Trigger re-validation automatically when a vendor submits a bank account change request — confirming vendor identity via TIN matching before the new account is activated. A key control against BEC impersonation fraud.
Teams: Treasury, AP
Marketplace Seller Registration
Embed in seller onboarding flows to validate TIN and screen against sanctions before a seller account is activated and before any payouts are processed. Catches mismatches at registration — not at the first 1099-K filing.
Teams: Platform, Payments, Compliance
Contractor Onboarding
Embed in HR, staffing, or gig platform onboarding to validate contractor TINs before first payment. Sole proprietors, single-member LLCs, and independent contractors are a high-mismatch population — validation at onboarding prevents that from becoming a CP2100 problem.
Teams: HR, Payroll, Platform
Periodic Re-Screening
Schedule automated re-screening of the full active vendor population against sanctions lists on a defined cadence — quarterly, semi-annually — to catch post-onboarding designations before the next payment run.
Teams: Compliance, AP, IT
Technical Overview
| Feature | Detail |
|---|---|
| Protocol | RESTful HTTP |
| Format | JSON request and response |
| Authentication | API key in HTTP header |
| Multiple API keys | Generate keys per system, environment, or team — each tracked independently |
| Response detail | Specific result codes — not pass/fail binaries |
| Audit logging | Every API call logged with timestamp, submitted data, result, and API key source |
| Validation types | IRS TIN Matching, Sanctions Screening, EIN & Company Lookup |
| Documentation | Full reference at tincomply.com/help-center/api |
Get Started Today
Embed Validation Where the Data Enters
IRS TIN matching, sanctions screening, and EIN lookup — all through a single RESTful API, with specific result codes, full audit logging, and multiple API key support. Catch bad data at the point of entry, not the point of consequence.
Other white papers
- EIN Discovery: Accurate EIN & Name Lookups
- Comprehensive Sanctions Screening for Every Industry
- Advanced API Integration: Transform Your Compliance Workflow
- What TIN Comply Offers
- Better BULK TIN Matching: No Limits. No Reformatting. No Duplicate Hassles.
- Better TIN Matching: Elevate Your TIN Matching Experience
- Comprehensive Validation Solutions