The Election Commission (EC) decided on Wednesday that two polling stations should recount their ballots while six others should re-conduct a new election due to discrepancies in the number of ballots.
The two polling stations that had been ordered to count the ballots again both were in Nam Pong District in Khon Kaen province. The poll results they gave did not match the number of the voter turnout, the agency reported.
Six other stations that will hold a second by-election were in Lampang, Yasothorn, Petchaboon, Phitsanulok, and Bangkok. Two polling stations are involved in Lampang.
The EC said the number of the ballots used did not match the numbers of the voter turnout in these six stations.
The same candidates are allowed to re-run in the election, according to the EC.
The agency expected the vote would be held after the Thai New Year though it was close to May 9 - the date when the final election results must be endorsed and announced.
The development came after Thailand held a general election last month in over 92,000 polling stations across the country.