Companies may need to perform "rigorous" checks on EU employees if there is a Brexit that has not materialized, as one minister has suggested.
Caroline Nokes said employers could not tell the difference between people who settled down in the UK and those who had just arrived.
It also revealed that the system for EU citizens who wanted to register for a fixed status did not yet work on Apple phones.
She said the US technology giant "We're going to need an upgrade so we can work."
The government wants the estimated 3.5 million EU citizens in the UK to apply for a fixed status, so they can continue to live and work here.
But that did not happen when the UK leaves the EU on March 29
In fact, Mrs. Nokes revealed to the Commons Home Affairs Committee that only 650 people have registered in a pilot program so far.
The government insists that EU free movement will end in March, but in practice, EU citizens will still be able to come and work in the UK by the end of the planned 21
But Ms Nokes suggested that in the case of a no-deal Brexit If there is no transitional period, next year new immigration controls will apply – including the employer's immigration status review – for EU citizens.
"If someone went through the establishment status system, they could prove it." She said.
"If someone has not been here before the end of March next year, employers must make sure they are subjected to adequately strict controls to prove their right to work."
She said the government did not want to go against EU law. "Discriminating" citizens who had "every right" in the UK and were "welcome" compared to those who were not.
"It would be a challenge for the government and the employer to distinguish between these two groups of people," SH (19659007) In a contradictory meeting, Ms. Nokes was repeatedly asked what the controls would be and what they would do to EU citizens and employers Company would mean.
She offered to cause confusion in a letter to the committee.  "Balanced status" will give EU citizens and their families who have spent five years in the UK the same rights as British citizens, including benefits, education, pensions and healthcare.
& # 39; cloud of uncertainty & # 39;
Lib Dem The Home Secretary, Sir Ed Davey, warned against a repeat of the Windrush scandal, where people with the right to live in the UK would be threatened with deportation because they did not have the right papers.
"Millions of EU citizens in the UK have been living in a cloud of uncertainty for more than two years, and far from clearing up this insecurity today, the Immigration Minister has made things worse," said Sir Ed.
"We have seen in the Windrush scandal how the conservative environmental controls of the Conservatives can destroy the lives of people who are right in the UK, and the government's chaotic attitude to Brexit risks repeating this scandal for the EU Citizens. "
In her statements to the Committee, Ms Nokes confirmed that EU nationals would not receive any papers substantiating their immigration status. The chairperson of the Joint Council for the Welfare of Immigrants said: "Caroline Nokes has stated that employers are doing the paperwork of EU citizens should be checked to determine their right to work after Brexit, even though there is no such paperwork.
"Another day, another example of a government that has neither the will nor the ability to do so Brexit to operate a fair and decent immigration system. "
Ms. Nokes told the committee that the government is still trying to get into trouble with their online. Www.mjfriendship.de/de/index.php?op…01&Itemid=37 […] said it was unfair "to blame the Home Office" for not releasing an update to fix the "Chip Checker"
Android phones will be able to download an app that reads the chip in their passport can, um verify their identity – and they can make a "selfie" that can be checked against home-office records.
But Apple device users will not be able to make use of this app and instead have to submit their passport to prove their identity.