I'd go old school for these and hand them a paper script from a script pad. Or even fax it to the school directly. If it looks computer generated and a kid is motivated and dishonest enough, they can try to forge a prescription in Word, or whatever Word processing program they have and they can make any document at home roughly match an AC document or fake an office letterhead. That's why I like "real" prescription pads. Too hard to fake or copy with VOID written all over them.
