The Labour party has said that the resignation of Immigration Minister Mark Harper demonstrates the complexity of immigration checks for landlords and employers.
Mr Harper resigned after discovering that his cleaner was in Britain illegally, although Downing Street said there was nothing to suggest that he knowingly employed an illegal immigrant.
"This information about Mark Harper’s employee does put him in a difficult position," Mr Hanson said.
"Perhaps once again the government need to think very carefully about how they approach this issue, as it is clear there are limits to the effectiveness of relying on employer and landlord checks to address illegal immigration."
More top news
More than 90% of hospices in England have been rated 'good' or 'outstanding' in a wave of new inspections.
Britain's youngest MP in 350 years said that the Commons still has a 'boys club atmosphere' which is 'alive and well'.
The National Lottery is upping the number of balls from 49 to 59, a move statisticians point out will make hitting the jackpot harder.