A copper coin, which under the native government, varied considerably in weight and value; in common parlance, it is sometimes used for money in general. [Wilson’s Glossary]

Paissa was introduced in this country by Pakistan Coinage Act (Amendment) Ordinance, 1960 (Ordinance 31 of 1960), making an amendment on Pakistan Coins Act (III of 1906) = PLD 1960, Central Statutes, Vol.II at page 236 for the Ordinance. [Rotofrusy on Civil Law and Rulings, Vol.II, p. 915]