The Election Commission of Thailand (ECT) on 19 June 2023 certified all 500 elected members of parliament, comprising 400 MPs from the election on a constituency basis and 100 from party lists of political parties.

ECT Secretary-General Sawang Boonmee said that the 500 MPs may report themselves to the ECT to receive their election certificates, from 20 June to 24 June, between 08.30 and 16.30 hr.

He stated that, in accordance with Section 138 of the Organic Act on the Election of Members of the House of Representatives B.E.2561(2018), after the announcement of the election results, if there is evidence justifying the belief that any candidate has committed an act constituting election fraud, the Election Commission will file a motion with the Supreme Court to revoke the results and order a new election, which must be completed within one year, following the 14 May 2023 general election.

Mr. Sawang explained that the ECT had certified the results of the election, because the process of investigations might not be completed within 60 days. It deems necessary to be fair to all sides, as many documents on the issue had been submitted and needed to be considered thoroughly.

He said that a total of 31,522,698 valid votes were used to calculate the number of party-list MPs, with a ratio of 375,226 per MP. After the calculation, there are a total of 17 political parties, which were elected to the House of Representatives under the party-list system.

The Move Forward Party came first, gaining 39 MPs, followed by the Pheu Thai Party, 29 MPs; the United Thai Nation Party (Ruam Thai Sang Chart), 13 MPs; the Democrat Party, 3 MPs; the Bhumjaithai Party, 3 MPs; the Prachachart Party, 2 MPs; the Thai Teachers for People Party, 1 MP; the Chart Thai Pattana, 1 MP; the Chart Pattana Kla, 1 MP; the Party of Thai Counties, 1 MP; the Thai Sang Thai Party, 1 MP; the New Democracy Party, 1 MP; the Fair Party, 1 MP; the Palang Pracharath Party, 1 MP; the Plung Sungkom Mai Party 1 MP; the Thai Liberal Party (Seri Ruam Thai), 1 MP, and the New Party, 1 MP.

The law requires that the first parliamentary session be called within 15 days after the ECT certifies results of the general election.