Kaminsky had just the trick. With lactic acid, he could erase ink from documentation without leaving a trace, and then write in whatever he wanted. At 18, he became the Resistance's youngest forger, and quickly thereafter, he also became their best. With the help of expert illustrators like Suzy Schidlof, he could forge 30 documents per hour, helping up to 500 people gain new identities every week.
With that kind of skill, Kaminsky could have made a fortune on the black market. But he refused to be paid for his heroics. He also refused to sleep most days, feeling guilty whenever he wasn't working. That's not a problem we can relate to, but then, we're not forcing two dozen people to risk death every time we skip writing a list to play Star Control.
By the time the Nazis were driven out of Paris, Kaminsky had saved the lives of at least 14,000 Jewish men, women, and children. He was given every French medal under the sun (which he doesn't like to talk about), and his skills were so good the French secret service put him to use making forgeries for their spies. Then in the '60s, he left behind his comfortable life in France to travel the world and forge documents for people fleeing other dictatorships -- free of charge, of course.