Typically, FrontStream clients do not print duplicate copies of invoices for their records. We maintain a copy of all receipts within our system should you be audited. Since you have access to view all receipt details as well as a copy of the physical receipt, and we do not allow changes to be made to tax receipts post-issue (without voiding and re-issuing a new receipt), our storage will satisfy CRA requirements. You can use Snapshot report to compare all tax receipt numbers that were issued for your organization during a specific time period. If you are missing any tax receipt numbers, you should also check your Voided Tax Receipt report to account for any tax receipts that you were issued to voided payments or subsequently cancelled. Many of our charities produce literally thousands of tax receipts each year so the time and effort (to say nothing of the paper) to produce duplicate hard-copies in-house, would be quite a burden. If for whatever reason you still wish to print duplicate copies of tax receipts, you can push out a duplicate tax receipt to your own email address, and then either store the electronic copy, or print and then store.
As a note, your Snapshot report, Purchase Items reports, and Voided Tax Receipt reports would be the reports needed for an auditor.