Seal of the Archiepiscopus Eleemosynarius Summi Pontificis
Once, while in the Vatican at the office of the Almoner (the Archbishop who signs the papal blessings and who distributes the fees to the deserving poor), I got to visit the room where a guy, a layman, stamps these papal blessings. The signature is just a stamp. The actual embossed seal is still done with the very large, old-fashioned seal machine, with each document having to be placed individually under the seal. Many hundreds are done each day while the fee for each, goes to charity.