Visible is single line accounts and each line would needs its own email address. There are no family type accounts or plans. Billing is all done paperless, there is no bill sent to you. There are different ways to pay, credit card and PayPal are two options that I know of and I believe Apple Pay and not sure but maybe also withdrawn from an account. As for payment it can be paid manually up to 7 days in advance or you can turn on autopay and it will take payment the night before the due date.
