Sports Lottery Issuance Act Article 18

A purchaser of a voided wager is entitled to seek refunds from the issuer, commissioned institution or licensed agent. The right to seek refunds will be nullified after two years period commencing from the day that the issuer announces the wager void.Purchasers of the aforesaid wager over the telephone, the Internet or other telecommunication equipment in the previous paragraph the refund shall be processed by the issuer.The circumstance of a voided wager stated in Paragraph 1 shall be drafted by the issuer and enforced after ratified by the competent authority.
中文原文 運動彩券發行條例第18條
運動彩券因無效投注,購買者得向發行機構、受委託機構或經銷商請求退款;其請求權,自發行機構公布無效投注賽事之日起,因二年間不行使而消滅。
前項運動彩券係透過電話、網際網路或其他電訊設備購買者,發行機構應主動退款。
第一項無效投注情形,由發行機構擬訂,報經主管機關核定後實施。

English translation for reference only; the Chinese text prevails. Not legal advice.