As many as 63 Windrush generation migrants may have been wrongly deported by the Government, the Home Secretary has admitted.
He said the figures were provisional.
Mr Javid told the Commons Home Affairs Committee that officials had so far found 63 people who may have arrived from the Caribbean before 1973 - the cut-off date for residence rights - who had been made to leave.
The wrongful removal of members of the Windrush generation applies to Caribbean nationals who were living in the United Kingdom legally and arrived in the country before 1973. So far, 526 people have been issued documents confirming their legal right to live in the UK.
The immigrants are named after the Empire Windrush, one of the first ships to bring Caribbean migrants to the United Kingdom in 1948.
Mr Javid told the committee: "I've asked officials to be absolutely certain and thorough and check over every record and make sure".
Michael Carrick: Man Utd coach on 'overnight' switch from player
Michael Carrick reflected on his final game, a 1-0 win over Watford on Championship Sunday. I am not getting carried away right here'. 'I'm not sad about it, ' he said.
In three cases, the person does have a legal basis to stay in Britain, while nine cases are ongoing.
Prime Minister Theresa May has announced a government review to understand how members of the Windrush generation "came to be entangled in measures" created to tackle illegal immigration.
British authorities could have wrongly deported up to 63 immigrants from the Caribbean, the new interior minister said on Tuesday in the latest revelation on the Windrush scandal that cost his predecessor her job.
According to a letter sent to MPs on the committee by Home Office permanent Secretary Sir Philip Rutnam, there have been 17 cases where deported Windrush immigrants have returned to the United Kingdom since 2015.
The UK government said it had set up a scheme to compensate people who may have been wrongfully detained, sacked, had their bank accounts closed or lost their homes because of the scandal.