EDIT link without logging in

Hi, 
Our registration is open to the public and we don't require them to have a Joomla account.
However, we want to give our registrants a chance to edit their registration, what tag should we use so they can edit using a link?
I see that there is Cancel link, but what is the Edit link?

Thanks,

Lito

Hello

As of right now, we do not support updating registration record without login. Registrants must have a Joomla account and logged in before they can update their registration history

Regards,

Tuan

Thanks for the immediate response Tuan.