Hello!
I have spent the last few days trying to work out how to email merge tax receipts as secured pdfs. Secured as in, password protected against editing only. So far the best route I have found is to export the data file from Mail>receipts. Then I have painfully created a pdf form and installed a trial plugin for that does allow me to send the receipts secured as a mass mailing.
I would love to hear what all the other charities in CANADA are doing to email secured tax receipts?