A judge at the High Court has upheld the legality of the Government's back-to-work scheme, but raised concerns about the letters it sends to jobseekers.
These letters are used to warn claimants that they may lose their benefits if they fail to participate in the schemes without good reason.
A spokeswoman for the Department for Work and Pensions said: "We do not believe there is anything wrong with the original letters and we will appeal this aspect of the judgment, but in the meantime we have revised our standard letters."
A spokeswoman for the Department for Work and Pensions said: "We are delighted, although not surprised, that the judge agrees our schemes are not forced labour.
"Comparing our initiatives to slave labour is not only ridiculous but insulting to people around the world facing real oppression.
"Thousands of young people across the country are taking part in our schemes and gaining the vital skills and experience needed to help them enter the world of work - it is making a real difference to people's lives.
"Those who oppose this process are actually opposed to hard work and they are harming the life chances of unemployed young people who are trying to get on."
Today’s decision should mean that many of those subjected to benefit sanctions will be entitled to reimbursement by the Department of Work and Pensions. It is truly extraordinary that the Government has found itself in this position by failing to provide basic information to those affected. We welcome the Court’s ruling on this issue but we continue to maintain that the Regulations themselves are unlawful and ought to be quashed. We are seeking permission to appeal the Court’s findings in this regard.
Mr Justice Foskett, sitting at the High Court in London today, said that "characterising such a scheme as involving or being analogous to 'slavery' or 'forced labour' seems to me to be a long way from contemporary thinking".
He said that both of the claimants were entitled to a declaration that there had been breaches of the 2011 jobseeker's allowance regulations in their cases.
But he ruled that the mistakes did not invalidate the 2011 jobseeker's allowance regulations, nor did they breach human rights laws banning slavery.