The Assets Examination Committee, appointed by the ruling military junta, recommended last month that Thaksin and his wife Pojaman should be charged over a controversial land purchase.

Attorney General Patchara Yuthi-dhammadamrong told Thai media that prosecutors plan to file the case at court on Thursday, in what would be the first charges against Thaksin since he was toppled in a coup last September.

Prosecutors also plan to ask the court to seize the five-hectare (13-acre) plot of land at question in the case.

"The case will be taken to the Supreme Court on Thursday. The Attorney General's Office will also ask the court permission to seize the land worth 772 million baht (23.4 million dollars)," Patchara told Thai media.

Pojaman bought the plot in Bangkok for the relatively bargain price of 772 million baht in 2003 from the BoT's Financial Institution Development Fund.

The land's value had earlier been estimated at 2.1 billion baht, according to Patchara.