Each in-person screening has a QR code that you can scan to “get credit” for all of the selections in that screening block. Different festivals will take different approaches to presenting this QR code. It may be in a hand-out at the screening or on a sign. Often, it will appear on screen at the start of the screening block.
The best approach is to login to the festival's SparqFest site before you attend the screening and then scan the QR code. Once you scan the QR code, you will be taken to the festival site and automatically given credit for having seen all selections in that block.