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You just need to examine them every two months with that dwindling sense of dread that you haven’t won anything once more and you’ve just wasted an hour of your life. Our really helpful technique is to look for the big prizes first (so verify your tickets first numbers against the jackpots) then go once more and examine the final 3 numbers for the smaller prizes. Taiwan regulation states that any businesses that have a monthly turnover of NT$200k must issue lottery receipt with purchases – though there are some exceptions like public transport top-up machines.