> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.withpersona.com/2020-05-18/api-reference/verifications/tin-database-verifications/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.withpersona.com/_mcp/server.

# TIN Database Verifications

> Verify a US taxpayer identification number against IRS records.

A TIN Database Verification answers the question "Does the US IRS database corroborate provided user data?".

## TIN Database Verification Checks

See the full set of TIN Database Verification checks in the [Verification Checks table](https://app.withpersona.com/dashboard/resources/verification-checks/) in your Dashboard.

## Product Versions

| Component | Version | Notes                                                              |
| --------- | ------- | ------------------------------------------------------------------ |
| TIN       | 2.0.0   | 1. Enhanced spam protection 2. Add redundancies to increase uptime |
| TIN       | 1.1.0   | 1. Standardize external service error reason codes                 |
| TIN       | 1.0.0   | Initial launch of TIN verification                                 |

> Verify a US taxpayer identification number against IRS records.


## API Docs

- Tin Database Verifications [Retrieve a TIN Database Verification](https://docs.withpersona.com/api-reference/verifications/tin-database-verifications/retrieve-a-tin-database-verification.md)

## OpenAPI Specification

The raw OpenAPI 3.1 specification for this API is available at:
- [OpenAPI JSON](https://docs.withpersona.com/2020-05-18/api-reference/verifications/tin-database-verifications/openapi.json)
- [OpenAPI YAML](https://docs.withpersona.com/2020-05-18/api-reference/verifications/tin-database-verifications/openapi.yaml)