With a A banknote (or ‘bill’ as it is often referred to in the US) is a type of negotiable promissory note, issued by a bank or other licensed authority, payable to the bearer on demand. More, this is the main face that portrays the most representative motif. With a A coin is a small, flat, round piece of metal alloy (or combination of metals) used primarily as legal tender. Issued by government, they are standardised in weight and composition and are produced at ‘mints’. More, it is also the main side or face where the symbol of the state or a portrait of the monarch and name of the country usually appear. The Facade, face. See Obverse. More side of a coin is commonly called “heads” in coin tossing, while the other side is called “tails”. See The back of the banknote or coin. See Obverse. More.