Family threatens to sue SCG

Piboonsak Soonpong, the family's lawyer, said the calculation was based on damage to the family's assets from 2004-6 plus interest of 7.5 per cent per annum. Some of the 600,000 share certificates belonging to the family were forged and sold by SCG employee Praphan Choomuang. Piboonsak said 90 per cent of the genuine certificates were sold through the market.

"We've worked with all related units: the Stock Exchange of Thailand (SET), Siam Cement and brokers. We've received cooperation, but no unit has taken responsibility for the damage," Piboonsak said.

"We're gathering as much information as possible before instigating a civil lawsuit. The family has assigned me to launch the case as soon as possible."

Yesterday he was at the SET Building to speak with officials at the Thailand Securities Depository. Piboonsak said this would become a standard for all shareholders and a reminder to all to review their roles and responsibilities.