Valuation of two-dollar bills, and many other types of paper currency, is based on four main factors: the year, signature combination, the serial number and the condition. Bills free of rips, folds, writing or creases carry a higher value.
Every two-dollar bill has a year printed on it, and certain years can carry a premium price. Each two-dollar bill is also signed by the Secretary of the Treasury and the Treasurer of the United States, and certain rare combinations can increase the value. Low or unique serial numbers can add to the value of a two-dollar bill. The condition of two-dollar bills can also have significant impacts on the value from a collector's standpoint.