The tourist pass can be redeemed through the redemption machine located at the Changi Airport MRT station. If you take the escalator down to the MRT station from the airport, the redemption machine will be on your right-hand side. Redemption process was simple and easy. You can use the tourist pass for all the MRT lines, bus lines, and so forth, so you can actually save a lot of money if you plan to use public transportation around the city frequently.