Banknotes of Northern Ireland
Banknotes have been issued for use specifically in Northern Ireland since 1929, and are denominated in pounds sterling. They are legal currencies, but technically not legal tender anywhere. This is not uncommon as most bank notes are not recognised as tender. However, the banknotes are still widely accepted as currency by larger merchants and institutions elsewhere in the United Kingdom. Issuing banks have been granted legal rights to issue currency, and back the notes with deposits at the Bank of England.
A £5 Sterling note issued by Bank of Ireland in Northern Ireland
A commemorative Ulster Bank note. The other side is similar to the standard five pound note
Legal tender is a form of money that courts of law are required to recognize as satisfactory payment for any monetary debt. Each jurisdiction determines what is legal tender, but essentially it is anything which when offered ("tendered") in payment of a debt extinguishes the debt. There is no obligation on the creditor to accept the tendered payment, but the act of tendering the payment in legal tender discharges the debt.
Detail of the obverse of a Series 1950 United States ten-dollar bill, showing the phrase "This note is legal tender for all debts, public and private, and is redeemable in lawful money at the United States Treasury, or at any Federal Reserve Bank." This phrase was subsequently shortened in later issues to "This note is legal tender for all debts, public and private."
Indian rupees were stamped with Government of Pakistan to be used as legal tenders in the new state of Pakistan in 1947.