He has been summoned under section 160 to record his statement.
Merchant, a London based Pakistani businessman and a co-accused in money laundering case, had alleged the top MQM leadership of getting funds from India and having contacts with Indian agencies.
The government of Pakistan had ordered the FIA to inquire into the allegations of Sarfaraz Merchant.
A government advertisement has also been published in a local Urdu daily advising the people having any information or documents related to the matter, to contact with Director FIA Islamabad Zone.
Sarfaraz Merchant had earlier expressed his willingness to cooperate with the Pakistani authorities.