Mutilated currency
Mutilated currency is a term used by the United States Bureau of Engraving and Printing (BEP) and the Bank of Canada to describe currency which is damaged to the point where it is difficult to determine the value of the currency, or where it is not clear that at least half of the note is present. Common causes of damage are fire, water damage, chemicals, explosives, damage caused by animals (including consumption of the currency) or damage from extended burying of the currency.