Details of the revenues from stamp duties estimated at N20 trillion still remains opaque as the federal agencies involved in the collection have refused to provide information, despite the  freedom of information (FOI) request filed by The ICIR. A stamp duty is the tax placed on legal documents, usually in the transfer of assets or property. The FOI request was sent on July 31 on behalf of LeaksNG to the Central Bank of Nigeria (CBN), office of the secretary to the government of the federation (OSGF), Nigerian Postal Service (NIPOST), and the Nigeria Inter-Bank Settlement System (NIBSS) PLC. Information requested were