Ousted Thai Prime Minister Thaksin Shinawatra is a "special ambassador" for Nicaragua and holds a diplomatic passport issued by the Central American country, the government said on Wednesday.
Thaksin received the passport after a February meeting with Nicaraguan President Daniel Ortega, the Nicaraguan government said in a press release.
The Thai government stripped Thaksin of his passport this week, accusing him of instigating violent protests that forced the cancellation of an Asian summit.
Thaksin has lived in self-imposed exile to avoid a two-year jail sentence on corruption and abuse of power charges after being deposed by a coup in 2006. It is unknown where he is now living.
Ortega appointed him to the post to help attract investment to the impoverished nation, the government said.
Protesters loyal to Thaksin surrendered on Tuesday after besieging Government House in the capital, Bangkok, for more than two weeks in a bid to force new elections. Two people were killed in the unrest.