The email address you enter during sign up is your Between ID.

You can technically sign up using a fake email address, but you may experience limitations while using Between. So please be sure to sign up using your actual email address.

Listed below are situations where you may enter an invalid address:

• You accidentally make a typo while entering your email address
• You borrow someone else's email address because you don't have your own
• You enter a fake email address in an attempt to match your ID to your partner's ID
• You add an emoticon in your email address

Please verify your account once you've completed the signup process to ensure there are no issues with your ID.

☞Verify account