Unique Domain Authentication ID (UDAI)
The Unique Domain Authentication ID, or UDAI, is a randomly generated unique identifier that is required to authenticate requests to transfer domain names from one registrar to another. A UDAI is generated when a domain name is registered, although the domain name's registrar can generate a new UDAI at any time if required.
Registrars are obliged to promptly make UDAIs available to registrants upon request and may not withhold them to prevent a domain name from being transferred under any circumstances.
