Refers to the lowest part of a Banknotes form a family when they maintain traits that identify them as members of the same group (unity of design, uniformity of structure, etc.), while they may be of different size., used mainly as This is the action by which certain banknotes and/or coins are exchanged for the same amount in banknotes/coins of a different face value, or unit value. See Exchange. in comparison to the middle denominations, often dispensed by ATMs, which are used for transactions. See also The term refers to the use of cash as a store of value. However, the term has a negative connotation of concealment, and is often used in the context of the war on cash. See Precautionary Holdings..