A trafficking victim, or their minor child, spouse, parent, or sibling, must have a letter from the federal Office of Refugee Resettlement (ORR) stating that pursuant to section 107(b) of the Trafficking Victims Protection Act of 2000, they are eligible for benefits to the same extent as a refugee, or a T visa, issued by the US Immigration and Citizenship Services.
The letter for an adult is called a certification letter. The letter for a child under age 18 is very similar, but is not a "certification letter" because the child does not have to meet the same requirements as an adult to get the letter from ORR. Both letters contain an initial certification or eligibility date.
Eligible relatives of trafficking victims are entitled to Derivative T Visas (T-2, T-3, T-4, or T-5).