A UDAI (Unique Domain Authentication Identifier) is an alpha-numeric 8 character code which is required to enable the transfer of a .nz domain name from one registrar to another.

The UDAI for your domain name must be provided to you promptly by your current registrar whenever you request it.

If you are asked to provide a UDAI to anybody for any other purpose than changing the registrar for your domain name then you should query this request.