Many sites seem to require that their users enter their email and password twice during the registration process.  How useful is it really?  It seems it could be a pain in the neck for many users, for limited gains, no?Thanks,JDelage
Confirm (enter twice) pw and email at registration - good idea?
website design
The reasoning stems from users not being able to see their password as they type it into the password box. The email field therefore does not require duplication.For the password field, it can be useful to ensure the user has not mistyped the password. However, if you have a forgot password function, then there is no reason the user cannot reset their password if it turns out they mistyped it.As Michael Pryor suggests in the comments, the fewer form fields you have, the more likely a user will (a) use the form in the first place, and (b) not make any mistakes. Tumblr seems to be the current 'poster child' for good registration form UI - they ask for only three fields, the absolute minimum you need to start using the service.See also this question from the UI Stack Exchange: Is a repeat password field necessary in a signup page?