§ 503
Postmarking stamps
Official text prohibited actmental stateif conditionpenaltylegal term
Whoever forges or counterfeits any postmarking stamp, or impression thereof with intent to make it appear that such impression is a genuine postmark, or makes or knowingly uses or sells, or possesses with intent to use or sell, any forged or counterfeited postmarking stamp, die, plate, or engraving, or such impression thereof, shall be or imprisoned not more than five years, or both.
History: (June 25, 1948, ch. 645, 62 Stat. 713 (PDF, 39 MB); Pub. L. 103–322, title XXXIII, §330016(1)(H), Sept. 13, 1994, 108 Stat. 2147 (PDF, 52 MB).)
Simplified explanation
It is a federal crime to forge postmarking stamps or postmarks to make them look genuine, or to make, knowingly use, sell, or possess to use or sell any forged postmarking stamp or tool.