The Central Bank of Nigeria (CBN) released guidelines on the regulation and supervision of non-interest microfinance banks (MFBs) in the country. In the document the banking sector regulator placed the NIMFBs into three categories namely Unit, State and National. A Unit NIMFB is required to have a minimum paid-up capital of N20 mn, a State NIMFB is required N100 mn, while a National NIMFB required N2 bn.