# Confirm Email Ownership with OTP Validation API | FastKYC

> Validate an email one-time password and confirm the customer controls the address they supplied, completing email ownership verification.

Source: https://www.fastkyc.com/apis/validate-email-otp/

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[Identity APIs](/apis/identity/)

# Validate Email OTP API

Validate an email one-time password and confirm the customer controls the address they supplied, completing email ownership verification.

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Category

[Identity APIs](/apis/identity/)

Built for

-   [Fintech & Payments](/industries/fintech-payments/)
-   [Gaming & Fantasy Sports](/industries/gaming/)
-   [Crypto & Web3](/industries/crypto/)
-   [Staffing & HR](/industries/staffing-hr/)
-   [Telecom](/industries/telecom/)

## What the Validate Email OTP API does

Validate Email OTP checks the code entered against the one sent and confirms whether email verification succeeded.

A successful validation is the record that the address is genuinely reachable and controlled by the customer, which is what makes it usable for statements, notices and account recovery.

## Where teams use the Validate Email OTP API

1.  Completing email verification at sign-up
    
2.  Confirming a changed email address
    
3.  Recording proof of address ownership for compliance
    

## Frequently Asked Questions (FAQs)

What if the code is wrong?

Validation fails and the customer can retry until the code expires, after which you should send a new one.

How long should verification last?

Treat it as valid until the address changes. Re-verify on any change.

Is email verification enough on its own?

It confirms a communication channel, not identity. Pair it with document and mobile verification for KYC.

## Related APIs

-   [Email Verification Send OTP API Send a one-time password to an email address to begin verifying the customer controls that inbox, the first step of email ownership verification.](/apis/send-email-otp/)
-   [EPFO Submit OTP API Validate the EPFO one-time password and complete authentication, unlocking access to the employee's provident fund records.](/apis/epfo-submit-otp/)
-   [Email Check API Verify an email address is legitimate and deliverable, filtering out disposable, invalid and undeliverable addresses before they enter your database.](/apis/email-check/)
-   [Contact Details by GST API Fetch the mobile number and email address registered against a GST number, giving you verified contact details for a business you are onboarding.](/apis/gst-to-contact-details/)

## Start verifying with the Validate Email OTP API

Book a walkthrough and we will show the call, the response and how it fits your onboarding flow.

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-   One API key for every check
-   Verified against official Indian records
-   Built for onboarding at scale