I have a sign up form where the email address needs to be displayed, but cannot be edited (it is pre-determined, like an invite). Is it sufficient to grey the populated email field out to signify that it can't be changed?
An argument against this would be to remove the users email from the form altogether and have it sit above the form.
The reason for wanting it within a form field however, is to cement the fact that this is the email attached to the account and to keep it as close to the create password field as possible (create password & confirm password are the only other fields).