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> - 2021-07-05: https://docs.withpersona.com/2021-07-05/llms.txt
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# 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                                 |