"I always honour my word and show relevant people their coffin," Suthep said, referring to the damning evidence linking the ruling party to campaign fraud, an offence punishable by party dissolution.

In her recorded statement, Rathima Phawalee, a party-list candidate for the Thai Ground Party, said her party chief Boonitthiphol Chinnarat had met with caretaker Prime Minister Thaksin Shinawatra and 14 other leaders from small parties on February 27.

Following the meeting, Boonit-thiphol told his party members he had the financial backing of the ruling party to contest the polls, Rathima said.

On March 2, registration day for party-list candidates, Boonitthiphol confirmed that the ruling party would reimburse the Bt50,000 fees she paid on her party's behalf, she said.

After completing candidacy registration that day, she said a Thai Rak Thai executive outlined a financial deal to help her party field its candidates for Bangkok's constituencies.

The ruling party promised to pay Bt30,000 per candidate, half of which would be paid after completing the registration process, she said.

On the following day, political veteran Paitoon Wongwanit joined her party, claiming he would represent the ruling party and bankroll her party's campaign expenses in the South, she said.

In a separate claim, Suthep said the ruling party had conspired with two senior electoral officials to falsify the membership record of a candidate from Nakhon Si Thammarat's constituency 3.

Natpracha "Jarae" Kuasakul was defeated under the Thai Rak Thai banner in the 2004 general election, he said.

Natpracha resigned his party membership in 2004 in order to prepare to run for a seat in the Senate but the ruling party tampered with his record in order to make him eligible for the snap election, Suthep alleged. He later delivered his evidence to the EC.

Suthep asked the watchdog's chairman,

Vasana Puemlarp, to watch the video and named two junior officials he said had violated electoral laws.

Suthep told Vasana he could provide more evidence of fraud.

Vasana thanked Suthep and said after listening to Suthep's information the alleged fraud might have arisen from defective work done by the EC.

"Our officials failed to delete or correct some information, therefore we must adjust our database," Vasana said.

Meanwhile, Thai Rak Thai legal staff working in Suthep's charges against the party yesterday provided evidence to the EC.

A source from ruling party said top party members were consulting with legal experts to defend the party against Suthep's fraud allegations. They might argue that the fraud, if proven, is the responsibility of individuals and not the party, the source said.

Democrat Party executive Sathit Wongnongtoey said the ruling party had tried to confuse the public by linking Suthep's revelations to his efforts to assist misled candidates from Trang.

"In my case, three candidates from the Progressive Democratic Party asked me to alert the Election Commission of possible campaign fraud," Sathit said.

He said he had left it up to the EC to solve the case and had never implicated the ruling party.

After Sathit brought his case to the public's attention, the ruling party claimed he had paid the candidates to stage a frame-up.