US: Iran's government make no sufficient efforts to prevent human trafficking

The US State Department has issued its annual 'Trafficking in Persons Report 2016' on 30 June 2016.

The report puts Iran in the lowest Tier 3 of its four-step classification of countries. Iran has been classified in the lowest category since 2009.
Other Tier 3 countries include North Korea, Russia, Sudan and Syria.

Fallowing is part of US State Department's annual 'Trafficking in Persons Report 2016' about Iran:

Iran government made minimal efforts to prevent trafficking…

IRAN: Tier 3
 Iran is a source, transit, and destination country for men, women, and children subjected to sex trafficking and forced labor. Accurate information on human trafficking in Iran is difficult to obtain. Organized groups reportedly subject Iranian women, boys, and girls to sex trafficking in Iran and in Afghanistan, the Iraqi Kurdistan Region, Pakistan, United Arab Emirates, and Europe. Iranian girls between the ages of 13 and 17 are targeted by traffickers for sale abroad…
An increase in the transport of girls from and through Iran en route to other Gulf States for sexual exploitation has been reported from 2009-2015; during the reporting period, Iranian trafficking networks subjected Iranian girls to sex trafficking in brothels in the Iraqi Kurdistan Region…In Tehran, Tabriz, and Astara, the number of teenage girls exploited in sex trafficking continues to increase.
Organized criminal groups kidnap or purchase and force Iranian and immigrant children to work as beggars and street vendors in cities, including Tehran. These children, who may be as young as 3, are coerced through physical and sexual abuse and drug addiction; reportedly many are purchased for as little as $150.
In January 2016, an international organization reported the Iranian government and the Islamic Revolutionary Guards Corps (IRGC) coerced male Afghans resident in Iran, including migrants and refugees, to fight in military brigades deployed to Syria by threatening them with arrest and deportation to Afghanistan. Afghan boys in Iran are vulnerable to sexual abuse by their employers and harassment or blackmailing by the Iranian security service and other government officials. Traffickers subject Afghan migrants, including boys, to forced labor in construction and agricultural sectors in Iran. Trafficking networks smuggle Afghan nationals living in Iran to Europe and force them to work in restaurants to pay off debts incurred by smuggling fees.

Pakistani men and women migrants in low skilled employment, such as domestic work and construction, are targeted by organized groups and subjected to forced labor, debt bondage, restriction of movement, non-payment of wages, and physical or sexual abuse.
 Increasingly, despite labor code protections for registered foreign workers, employers seek adjustable contracts which make workers vulnerable to exploitative work practices such as coerced overtime and denial of work benefits. 

The Government of Iran does not fully meet the minimum standards for the elimination of trafficking and is not making significant efforts to do so. As in previous reporting periods, the government did not share information on its anti-trafficking efforts. Public information from NGOs, the media, international organizations, and other governments indicates the Iranian government is not taking significant steps to address its extensive trafficking problem, particularly with regard to the protection of trafficking victims.

Furthermore, during the reporting period, allegations arose of complicity by Iranian officials in the coerced recruitment and use of Afghan men for combat in Syria...

Moreover, female victims of sexual abuse, including sex trafficking victims, are subject to prosecution for adultery, which is defined as sexual relations outside of marriage and is punishable by death…
The government did not distinguish between trafficking victims, those seeking refugee status, and undocumented immigrants, and held foreign trafficking victims in detention centers and jails until their deportation…
The government did not make sufficient efforts to prevent human trafficking. The government did not improve transparency on its anti-trafficking policies or activities, nor did it make discernible efforts to forge partnerships with NGOs or international organizations to combat human trafficking. The government made no discernible efforts to reduce the demand for commercial sex acts, forced labor, or child sex tourism by Iranian citizens traveling abroad...
The government has not ratified the UN Convention against Transnational Organized Crime, despite previous reports the parliament was reviewing the convention. Iran is not a party to the 2000 UN TIP Protocol.

Source: US State Department