Officially, Nigeria still uses N5, N10, N20, and N50 notes. On the streets, they are gone. Not by law. Not by policy. Not by a governor’s signature at the Central Bank. But by behaviour. Walk through Balogun, Ojuwoye, Agege market in Lagos, or Akute markets in Ogun state and try paying with a N10 note. Legal tender it may be, but socially, it is obsolete. This is redenomination by stealth.