Each Pitt-Pollaro piece of furniture is made in limited edition and is signed and numbered. The piece bears the mark of the makers and their signatures, along with the edition number guaranteeing that the piece is original. The mark may be branded into the wood, stamped into the metal, or fixed as a bronze plate.

Every piece is accompanied by a Certificate of Authenticity which outlines all details associated with the piece including year of original design, year of creation, materials, and edition number. In some cases the editions may be limited to a specific set of materials and colors. Some pieces are unique because of the rarity of the materials.