The Maenza post office was subordinate to the Piperno first class distribution office. In 1871, Maenza had a population of 1,785.
Maenza, undated, but prior to January 1, 1864, 1 bajocco black on blue green 1852 pays the rate for a single letter within the same direzione postale. Piperno transit marking on front, addressed to Sonnino.
Maenza, November 14, 1864, 2 bajocchi black on greenish white 1852, pays the reduced 2 bajocchi rate effective January 1, 1864. Ornate framed rectangle Maenza origin postmark on back, with PIPERNO transit marking on front and Frosinone, November 16, 1864 arrivial marking on back.