Rimsha Masih, aged 14, was detained in a maximum security prison for several weeks in August 2012, accused of burning pages from the Koran.
The case attracted widespread international concern.
Although charges against Rimsha were dropped, she and her family were forced into hiding after death threats.
Rimsha, who is believed to have learning difficulties, was arrested in a Christian area of the Pakistani capital, Islamabad, after a furious crowd demanded she be punished.
A local Muslim cleric has since been accused of framing her.