The Economic and Organised Crime Office (EOCO) has asked Mr Ibrahim Mahama, brother of former President John Mahama, to pay GH¢12.7m to the state by May 8, 2017 it has been gathered.
The amount represents duty for construction equipment he cleared at the Tema Port and issued about 44 cheques which were not honoured.
Mr Mahama, owner of the construction company, Engineers & Planners, and a brother of former President John Mahama was meeting EOCO on Friday for the third time this week.
The meeting followed an invitation to answer questions on a number of cheques he is alleged to have issued to the Ghana Revenue Authority (GRA) in 2016 to pay for import duties on construction equipment.
He first met the anti-corruption agency on Tuesday in relation to an ongoing probe over the cheques.
EOCO's order was communicated to him on Friday.