
The People's Alliance for Democracy (PAD) has been rallying for authorities to terminate Thaksin's travel documents since he jumped bail while being tried over the Ratchadaphisek land-purchase deal.
The Foreign Ministry is authorised to revoke the passport of any Thai citizen facing criminal charges and stop them from travelling overseas.
However, Foreign Minister Tej Bunnag said Thaksin, as a former premier, could not be treated like an ordinary citizen and that Samak should be the one making decisions in this case.
Tej said he had sent all the necessary documents to Samak enabling him to make the decision.
Samak, meanwhile, said he had not discussed the matter with the foreign minister yet, while Tej has said that he would bring the issue up when the Cabinet meets on Tuesday.
Thaksin's diplomatic passport was revoked in 2007 by then-prime minister Surayud Chulanont, though former foreign minister Noppadon Pattama issued him a new one soon after Samak took office early this year.
The Senate's deputy chairperson of the Foreign Affairs Committee, Priyananta Rangsit, said both Tej and Samak had the power to decide on the case. She added that the law required revoking the passport of a fugitive facing criminal charges, reiterating that a criminal had no privileges.