Attorneys, advocates, and judges have raised concerns about the dramatic rise in fast-track deportations, saying they have resulted in many immigrants being deported without knowing their rights or understanding the consequences. “That is everyone’s underlying concern — is there due process here?” said Gilbert Gembacz, a retired immigration judge in Los Angeles. “Are people getting a full explanation? Are they getting a case-by-case review of all their options? I don’t think they are. I think they are being told, ‘Hi. You’re here illegally, and we are going to send you back.’ ” Jayashri Srikantiah, the director of the Stanford clinic, said some detainees are pressured to sign deportation forms even though they may have defenses against deportation or be eligible for asylum or green cards. About 95% of the people who agreed to the speedy deportations since 1999 are not represented by attorneys. “We have people mostly who are in detention in remote locations, without lawyers, who are non-English speakers, and they are being asked to sign away their rights,” Srikantiah said. Immigration and Customs Enforcement authorities counter that the program is voluntary and that deportation officers clearly explain options to detainees, including the choice to see a judge.