# SSN Check

### About service

An SSN Check is a US identity verification service for validating a customer’s **Social Security Number (SSN)**.

It verifies the SSN against authoritative government records and confirms it matches the customer’s provided details. This helps you reduce onboarding risk and strengthen KYC (Know Your Customer) controls.

{% hint style="info" %}
[Learn about the SSN Check API (Social Security Number verification).](https://app.gitbook.com/s/kAhgmUKSf8CFUFVL3GEe/check-types/ssn-check)
{% endhint %}

### Common use cases <a href="#common-use-cases" id="common-use-cases"></a>

This service is commonly used in the following scenarios:

* **US customer onboarding**: Verify the identity of US-based customers during account opening and registration flows.
* **Fraud prevention**: Detect identity discrepancies and potential synthetic identities during verification.
* **US KYC / CIP compliance**: Support Customer Identification Program (CIP) requirements for regulated US businesses.

### Analysis performed

The SSN Check confirms the **validity of the SSN** and the **authenticity of the customer details** provided.

**Detailed verification checks**

<table><thead><tr><th width="204.53515625">Analysis</th><th>Verifications Performed</th></tr></thead><tbody><tr><td><strong>Data Verification</strong></td><td><p>Verifies the following customer details against US government records:<br></p><ol><li>First name</li><li>Last name</li><li>SSN</li></ol></td></tr><tr><td><strong>Database Analysis</strong></td><td>Confirms that the SSN has been legitimately issued, is currently active, and cross-checks it against mortality databases to ensure it is not associated with a deceased individual.</td></tr></tbody></table>

### Check duration

An SSN Check takes an average of **1 second** to complete.

### Related checks

You’ll typically run SSN Check alongside other identity verification methods, such as:

* [Document Check](https://docs.complycube.com/documentation/product-guides/identity-verification/document-check) for ID document verification.
* [Identity Check](https://docs.complycube.com/documentation/product-guides/biometric-and-liveness-verification/identity-check) for biometric liveness verification.
* [Proof of Address Check](https://docs.complycube.com/documentation/product-guides/kyc-automation-services/proof-of-address-check) to extract and verify address evidence from documents.
* [AML Screening Check](https://docs.complycube.com/documentation/product-guides/watchlist-pep-and-adverse-media/aml-screening-check) to screen customers against sanctions, PEP, and adverse media.

### Related topics

Use these to run SSN Check inside a broader KYC flow:

* [Workflows](https://docs.complycube.com/documentation/product-guides/compliance-studio/workflows) to orchestrate checks into a single customer journey.
* [Policies](https://docs.complycube.com/documentation/product-guides/compliance-studio/policies) to apply consistent decision rules across journeys.
* [Advanced Case Management](https://docs.complycube.com/documentation/product-guides/due-diligence-tools/advanced-case-management) to manage exceptions, tasks, and reviewer outcomes.