Campaigners have accused the Home Office of a lack of “decency” after it emerged dozens of people deported to Commonwealth countries have not been contacted by the Windrush task force.
Ministers said “no specific attempt” had been made to approach 49 people deported to Ghana and Nigeria in 2017.
The Home Office says it is up to Commonwealth citizens to seek information about their status.
MPs said it showed the government had learned nothing from the scandal.
The Windrush scandal was uncovered earlier this year, after many people from Commonwealth countries who had legally lived in Britain for decades were wrongly classed as illegal immigrants and deported.
They had been encouraged by the UK government to settle in Britain from the late 1940s until 1973.
However, although they had been granted indefinite leave to remain in the UK, some immigrants did not have formal paperwork confirming their residency status.
It meant when the Home Office embarked on its so-called “hostile environment” policy designed to make staying in the UK more difficult, some Commonwealth immigrants were wrongly deported.
Their problems were compounded by a Home Office decision, in 2010, to destroy their landing cards – often the only record of their immigration status.
Following a public outcry, the government set up a task force to help people formalise their right to remain in the UK.
Thousands of people have now contacted the task force and received documents confirming their right to stay in Britain.
However, following parliamentary questions from Green Party MP Caroline Lucas, Home Office ministers now admit there are 49 people who have still not been informed by the government that the task force exists.
The 49 were deported to Ghana and Nigeria between March and September 2017 – before the Windrush scandal erupted.
Satbir Singh, the chief executive of the Joint Council for the Welfare of Immigrants, said: “If the Home Office has the capacity to deny somebody their rights, to separate them from their loved ones and remove them from the country, surely it has the capacity to find them, to apologise and to help them come home.
Liberal Democrat home affairs spokesman Ed Davey said anyone who may have been wrongly deported should be contacted and told how to apply to return and receive compensation.
“In these cases, the Home Office seems to be waiting around for people to contact them – even though they may not have the means or information to do so. That’s an utter disgrace.”
The Home Office announcements relating to Commonwealth citizens can be found at www.gov.uk/windrush.
This website is regularly updated with information about how individuals who believe they qualify under the Windrush criteria can apply for status under the Windrush Settlement Scheme.
Assistance is also available through the Windrush Taskforce helpline on freephone 0800678 1925 or by email at firstname.lastname@example.org.”