Currently, Test Track in Epcot is the only attraction to feature PhotoPass technology. After exiting the attraction, guests can locate their ride photo on a bank of monitors and insert their PhotoPass card into a slot (which has an indicator that momentarily turns from red to green upon successfully crediting the photo to the card) to claim it. There should be a cast member at the monitors to assist any guests that may be having difficulties as well as to distribute new cards to those who need them.
The Test Track photo border is one of the options when viewing the photo online or purchasing it in the parks.
It’s expected that more attractions will include support for PhotoPass in the future, but it’s likely to appear on newer attractions before the older attractions receive this feature.