EPP Authorization Code

An EPP authorization code (auth code, authinfo or transfer key) is a secret string attached to a domain at the registry. The gaining registrar must present it to start an inter-registrar transfer, proving that the current registrant approved the move. EPP, the Extensible Provisioning Protocol, is how registrars talk to registries.

Why it matters

The code stops someone from transferring your domain just by knowing its name. Anyone holding it, along with an unlocked domain, can try to move it, so treat it like a password. Registrars usually generate it on request in the control panel, and many send it by email or display it for a limited time. Some TLDs use different mechanisms or no code at all.

Example

A typical transfer sequence:

1. Disable the transfer lock at the current registrar.
2. Request the auth code.
3. Start the transfer at the new registrar and enter the code.
4. Approve any confirmation email.

Auth code example format: Xk9#mP2vLq7!

Formats and lengths vary and the one shown is only illustrative.

Common mistakes

• Sharing the code in an unprotected channel.
• Submitting it while the domain is still locked or has privacy contact emails that nobody checks.
• Copying trailing spaces when pasting.

Related

• Domain transfer
• Transfer lock
• Registrar
• गाइड: Domain transfer guide

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