3316883869 Hello,
Unfortunately you can't cange the email for your registered box.
But don't worry, email registration on the box only applies as identity data to the box list on the server, it doesn't affect anything.
What matters is email registration at UFI Credit, because email will be used as a notification for transactions and credit use.
You can change your email on the UFI Credit menu by clicking the pencil button next to the email field.
B.R