Most schools have decided to "go green" just as Smart Tuition has.  In fact, most schools default all families to receive emailed invoices instead of by mail, for both invoice generation timelines purposes, as well as to quicken the time it takes for parents to receive their invoice.  The verbiage of "mail me an invoice for each payment I have due" is outdated and should state "Mail/ Email" to allow for one option or the other.