The Home Office said the woman was arrested on suspicion of fraudulently taking the assessments, giving applicants an unfair advantage, after immigration officials carried out an arrest warrant at an address in Dartford on Friday.
Criminal and financial investigation lead for London at the Home Office, Chris Foster said: "This operation demonstrates the dedication of our teams in securing today’s [Friday’s] arrest and sends a clear message that we will not tolerate immigration fraud in the UK.
On 27 January, immigration officials arrested a woman on suspicion of fraudulently completing the Life in the UK test for at least 14 people.
"This individual [allegedly] went to extreme lengths, using wigs and disguises to impersonate others and cheat the immigration system, showing a complete disregard for UK safety and immigration laws.”.
The 42-year-old woman is alleged to have used a variety of disguises to complete Life in the UK assessments for 12 applicants at several test centres, the Home Office has said.