Fun Fact: Most of the time, when you buy something, you get a receipt. Most people throw them away. In Taiwan, you keep your receipts because they are cash money lottery tickets. Every two months, the government releases six numbers, and you can match the number at the top of the receipt to their numbers. There are three grand prize numbers for $200,000NT ($6,200USD), and the other three numbers you can match the last 3,4,5,6,7, or all the numbers to win different amounts of prize money. Then you take the receipt and your ID to any post office to collect the money. You can also donate your receipts to different organizations or homeless people so they have a chance to win.
This baby won me $200NT ($6.00USD), and it was a receipt for $80NT ($2.50USD). Not too shabby.