Public officials Election And Recall Act Article 125

If a voter discovers any factor that shall render invalid an election, the election of a person, a recall, or the adoption or rejection of a recall proposal, they may, within seven days after public notice of the list of electees or the result of the recall is issued, report the matter and submit any material evidence of the said factor to prosecutors or the election commission.
中文原文 公職人員選舉罷免法第125條
選舉人發覺有構成選舉無效、當選無效或罷免無效、罷免案通過或否決無效之情事時,得於當選人名單或罷免投票結果公告之日起七日內,檢具事證,向檢察官或選舉委員會舉發之。

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