XF 1.1 Forcing users to reconfirm accounts


Is there a way to make users reconfirm their accounts so when they login they are sent to a registration process where they have re-check their settings?

Why I want to do this is because sometimes you add custom fields that has to be filled in and if they are not something will go wrong, in my case they wont be able to login to our servers.
Please share! This would be a great idea when migrating to xF and importing data, forcing users to reconfirm on their first sign-in with xF.
Hmm it doesnt work, I tried to check the custom field and then leave it empty so if it's empty you would get a notice.. But it doesnt do that :(