Thailand's top court has refused to hear an appeal by ousted leader Thaksin Shinawatra against the seizure of assets worth almost $1.5bn (£950m).
The assets were frozen in 2006 when Mr Thaksin was overthrown in a military coup, and a court ordered in February that they should be seized.
It ruled that they had been gained illegally through conflict of interest when he was prime minister.
This is just one of a series of legal battles Mr Thaksin faces.
He has also been accused of terrorism in connection with the recent anti-government protests in Bangkok. He denies the allegations.
Judges ruled in February that Mr Thaksin, a telecommunications magnate, had shaped government mobile phone and satellite communications policy to benefit his firms.
They said that he had concealed his stake in the family telecoms business, Shin Corp, which was sold to the investment arm of the Singapore government for a large profit.
The Supreme Court refused to accept the appeal because the family presented no new evidence, the Bangkok Post quoted a court official as saying.
Mt Thaksin lives in self-imposed exile overseas and faces a two-year prison term for corruption if he returns to Thailand.
Many of those who took part in the anti-government protests that paralysed the Thai capital for weeks earlier this year were his supporters.