The Nigerian National Petroleum Corporation, NNPC, has said that it is not involved in the collection of signature bonuses paid by oil companies to the Federal Government upon their successful bid for oil blocks. Speaking on the role of NNPC in the oil revenue collection process at a hearing of the House of Representatives ad-hoc Committee on Oil Prospecting Licenses (OPLs) and Oil Mining Leases (OMLs), the Group Managing Director of NNPC, Maikanti Baru, said the corporation had no role in the collection of signature bonus.