The Passport Office insisted it took security "extremely seriously" after it emerged that a passport, birth certificate and visa documents were sent to the wrong person.
The documents, intended for a Pakistani man living in Lancashire, were sent to nursery worker Sarah Threlfall in Broughton, North Wales.
More top news
A teenager from Bradford who was indoctrinated with 'chilling' extremist views has been jailed for plotting to go to Syria to fight for IS.
Georgina Ferguson was on a carriage behind the one that was bombed. This is her very personal story of 7/7.
HSBC has sacked employees who staged a mock Islamic State-style beheading during a team-building exercise.