Former Taipei leader Ko Wen-je has been accused of financial and economic corruption.
Former Taiwanese leader Ko Wen-je has been indicted for accepting bribes and misusing political donations.
Mr Ko was indicted by prosecutors on Thursday following an investigation into corruption in the renovation of a shopping mall in Taipei during his tenure as mayor of the Taiwanese capital and financial instability during his 2024 presidential bid.
The Taipei Public Prosecutor's Office said in a statement that it is seeking a 28-and-a-half-year prison sentence for Ko, who is accused of accepting T$17.1 million ($522,392) in bribes and embezzling more than T$68 million in donations.
Prosecutors also announced charges against several members of the Taiwan People's Party (TPP) for misusing political donations.
Ko, who served as mayor of Taipei from 2014 to 2022, previously pleaded not guilty in a housing scandal after his arrest in August, although he admitted to campaign finance irregularities.
A Taipei court ruled the following month that Ko, a trained surgeon, be released from prison because prosecutors did not meet the “probable” standard of guilt.
Ko, who came third in the January presidential election with nearly 27 percent of the vote, has been seen as a potential presidential contender in 2028.
The TPP, which Ko co-founded in 2019, has eight seats in the 113-member Legislative Yuan.
The party has worked with the Beijing-friendly Kuomintang to push through controversial constitutional changes that the ruling Democratic Progressive Party says are aimed at preventing President William Lai Ching-te from ruling the island.