The U.S. State Department last year downgraded Thailand to the lowest category in its influential annual ranking of countries by their counter-trafficking efforts.
Thailand's military-backed government was "confident" it had met the minimum standards to improve its ranking, said Songsak Saicheua, a director-general at the foreign ministry, at a Friday news conference announcing the report's release next week.
"We've not only set up committees and formulated policies," Songsak told Reuters. "We've made serious, sustained efforts and produced tangible results."
In 2014, the government said, 595 victims of human trafficking were identified, 280 cases investigated, 115 cases prosecuted and 104 people convicted.
However, this compares unfavorably to Thailand's record in 2013, which sealed its demotion to the State Department's lowest "Tier 3" category, a designation it shares with North Korea, Libya and 20 other countries.
In 2013, 1,020 victims were identified, 674 cases investigated, 386 cases prosecuted and 225 people convicted.
Thailand's military vowed to "prevent and suppress human trafficking" after overthrowing the elected government of Prime Minister Yingluck Shinawatra last year.
In a Jan. 26 meeting in Bangkok with Daniel Russel, assistant U.S. secretary of state for East Asia and the Pacific, the Foreign Minister General Tanasak Patimapragorn reiterated his government's "unwavering commitment to sustainably solving the human trafficking issue".
But rights groups and some officials say words have not translated into action, with the junta preoccupied with reviving a sluggish economy, drafting a constitution and stifling even the mildest expression of dissent.
The government was placing "special emphasis" on punishing officials complicit in trafficking, said the report, citing legal action against at least a dozen people, mostly police.
None of the officials had yet been convicted, said Songsak.
Last year, Thailand gave legal papers to 1.6 million undocumented migrant workers, which the government said made them less vulnerable to exploitation and trafficking.
"It is a positive step that the government recognizes and acts upon this link between migration management and anti-trafficking," said Max Tunon, a senior program officer at the International Labour Organization.
But, as Reuters reported last October, trafficking routes through southern Thailand thrive.
Thousands of Rohingya Muslims and Bangladeshi boat people are held at remote Thai jungle camps where traffickers extract a ransom to smuggle them across the border to Malaysia. Many die en route, or are beaten or killed by traffickers.
The Rohingya are a mostly stateless minority fleeing violence and poverty in Myanmar. A Thai government report submitted to the State Department last year did not define the Rohingya as trafficking victims, despite their well-documented abuse.
The new report does, noting the rescue of 139 Rohingya from trafficking networks in 2014, and another 97 on Jan. 11.
The government also said the authorities were using anti-money laundering laws to put pressure on human trafficking syndicates and had set up a hotline which helped identify 123 trafficking-related cases in 2014.
These latest measures amounted to "old wine repackaged in new bottles," said Phil Robertson, deputy director of Human Rights Watch's Asia division.
"For years, hotlines have been around and migrants have been registered, but the trafficking problem continues unabated," he said.
(Additional reporting by Kaweewit Kaewjinda; Editing by Robert Birsel)