New 50 naira note
You're referring to the newly introduced N50 note in Nigeria!
Yes, the Central Bank of Nigeria (CBN) introduced a new N50 note on June 24, 2021, as part of its efforts to improve the country's cashless policy and reduce the use of lower denomination notes.
The new N50 note features a portrait of Dr. Nnamdi Azikiwe, a Nigerian statesman and philosopher, on the obverse (front side), while the reverse (back side) features a collage of Nigerian cultural symbols, including the Adire cloth, the Yoruba bronze head, and the Nok terracotta figure.
The introduction of the new N50 note is expected to reduce the use of smaller denomination notes, promote cashless transactions, and make it easier for people to conduct financial transactions.