The Singaporean presidential election of 2005 was held to elect the next President of Singapore. The Writ of Election declared 17 August to be Nomination Day, and 27 August would have been declared Polling Day if more than one candidate were to stand nominated on Nomination Day.
After considering the candidate's applications, the Presidential Elections Committee issued one Certificate of Eligibility to Nathan.  Nathan was the only candidate to stand nominated and thus re-electing uncontested on nomination day and was sworn-in for his second term of office on 1 September 2005.
Kuan was the former chief financial officer of Jurong Town Corporation (JTC). Independent media in Singapore widely speculated that the PAP government was not prepared for Kuan's candidacy, with the Think Centre NGO accusing the state media of "badmouthing" him.
Application for the Certificate of Eligibility rejected.
Ooi was a real estate executive. His application for the Certificate of Eligibility was rejected by the Presidential Elections Committee due to his lack of experience and ability required by the Constitution.
Ramachandran Govindasamy Naidu
His application for the Certificate of Eligibility was rejected by the Presidential Elections Committee due to his lack of experience and ability required by the Constitution.
On 9 August, Prime Minister Lee Hsien Loong called for all candidates to be open about their records, so that Singaporeans could make an informed judgment on them. He also encouraged Andrew Kuan's former employers to come forward, speak freely and tell Singaporeans what they knew about him.
On 11 August, Kuan's former employer, JTC called a news conference to provide details on the circumstances leading to Kuan's resignation in July 2004. Chong Lit Cheong, chief executive officer of JTC said that Andrew Kuan's work at JTC had been unsatisfactory since his first year there and he had been asked to resign twice in 2003 and 2004. No details as to how his work was unsatisfactory were provided, other than a note that no fraud or other crime was involved, and he needed "quite a fair bit of hand holding". In reply, Kuan noted that he had worked at JTC Corporation for 37 months, which had extended his contract several times, and he had been given performance bonuses and a raise during this period. Another company, Hyflux, also publicly criticised Kuan.
Later, Kuan was disqualified by the Presidential Elections Committee for failing to meet the criteria for running for president. The committee said Kuan's seniority and responsibility as JTC's chief financial officer were not comparable to those required by the Constitution. A presidential candidate is required to have had experience as the chairman or CEO of a statutory board, or of a company with a paid-up capital of at least S$100 million.