Candidates from two parties have ramped up pressure on their parties to fully reimburse them for costs they incurred during the election campaign.
More than 60 Puea Chat candidates on Wednesday renewed their demand for the reimbursement of money they had paid out of their own pocket during the election campaign.
They on Wednesday held talks at the party's headquarters at Imperial World Lat Phrao department store in Bangkok with the party's executives.
The talks came after disgruntled candidates issued a reimbursement demand earlier this week.
Wednesday's closed-door meeting was attended by key party executives including Aree Krainara and deputy leader Phetcharawat Watthanaphongsir.
The talks were so secretive nobody was allowed to bring their mobile phones into the meeting, a source said.
Reporters weren't allowed nor were the aggrieved candidates allowed to speak to a third party without permission from the party, the same source said.
Panasan Sunanta, who ran in Constituency 2 in Sukhothai, said later that candidates in the northern provinces had given the party an ultimatum that they pay at least some of the money back by April 10.
The party had promised to compensate the candidates but has not said how much would be paid and when.
Mr Panasan said party executives had told constituency candidates in the lead-up to the March 24 election to campaign hard and promised they would be fully reimbursed.
He said each of them had only received 10,000 baht to pay for the candidacy registration fee and another 120,000 baht for campaign posters, while they had each spent 800,000 baht on average.
However, Deputy Puea Chat spokesman Rayut Bunthan, suggested the supposed agreement may not be as cut and dried as the candidates believe.
"The party is a small one and it doesn't have a huge budget for this purpose, which explains why it had to reach an agreement with its candidates before the election," he said.
Meanwhile, more than 50 candidates of the Thai People Power Party lodged a complaint with the Crime Suppression Division accusing party executives of fraud for failing to fulfil their promise to fully reimburse them for campaign costs.
