U.S. Stamps - Semi-Postals
Semi-Postal Stamps include a first class postage charge, plus an additional amount to fund a charity or community cause, such as health care and research. While semi-postals are an important element of some country collections, France, for example, has issued over 700 Scott Listed Semi-Postals, beginning in 1914, the United States has only issued four, beginning in 1998.