Nauru:
Australian dollar (AUD)

Nepal:
Nepalese rupee (NPR)

Netherlands:
Netherlands guilder (NLG); euro (EUR)

note: on 1 January 1999, the EU introduced the euro as a common
currency that is now being used by financial institutions in the
Netherlands at a fixed rate of 2.20371 Netherlands guilders per euro
and will replace the local currency for all transactions in 2002

Netherlands Antilles:
Netherlands Antillean guilder (ANG)

New Caledonia:
Comptoirs Francais du Pacifique franc (XPF)

New Zealand:
New Zealand dollar (NZD)

Nicaragua:
gold cordoba (NIO)

Niger:
Communaute Financiere Africaine franc (XOF); note -
responsible authority is the Central Bank of the West African States

Nigeria:
naira (NGN)