Edit page without permission via unique link

[lenoir]

Is it possible to let people edit a page without having to have a user-role?

My case is the following:

Visitors fill in a form (Formbuilder) which is saved to pages. They get a confirmation email which could contain a unique editing link. In case they need to update some information, they can click on this link, edit the fields and save. 

Am I totally off? Is there a better practice?