If you are a web developer and needs to handle user registration the you probably are sending out confirmation emails to users to ensure they’ve entered a valid email.
Lots of web sites (and apps) are showing a message saying “We’ve send you a confirmation mail. Please check your mailbox”.
Tip of the day is this – make sure to include the actual email in that notification message. In case a user actually entered a wrong email he will notice immediately and doesn’t need to refresh his email box to see if the mail is coming through. A simple “Hey, we’ve send off a confirmation mail to john@doe.com now. Please check your mailbox in a minute” is enough.
I’ll add this tip to an upcoming article about UI tips & tricks for apps and web sites.