notgeld

upright=1.35|thumb|Different examples of German notes, 1917–19 '''''' (German for 'emergency money' or 'necessity money') is money issued by an institution in a time of economic or political crisis. The issuing institution is usually one without official sanction from the central government. This usually occurs when not enough state-produced money is available from the central bank. In particular, generally refers to money produced in Germany and Austria during World War I and the Interwar period. Issuing institutions could be a town's savings banks, municipalities and private or state-owned firms. Nearly all issues contained an expiry date, after which time they were invalid. Issues without dates ordinarily had an expiry announced in a newspaper or at the place of issuance.

was mainly issued in the form of (paper) banknotes. Sometimes other forms were also used: coins, leather, silk, linen, wood, postage stamps, aluminium foil, coal, and porcelain; there are also reports of elemental sulfur being used, as well as all sorts of re-used paper and carton material (e.g. playing cards). These pieces made from playing cards are extremely rare and are known as , the German word for 'playing cards'.