Princz, now 73, was born to a naturalized American businessman in what is now Slovakia, making him a U.S. citizen at birth. Although the family had American passports, they were imprisoned by the Nazis.
In September, the United States and Germany signed an agreement under which Princz and 10 other American survivors shared a one-time payment of $2.1 million from the German government.
Reno estimated that there may be five to 50 such survivors who, like Princz, fell through the cracks and were never compensated.
Eligible survivors must file their claims by Sept. 30 with the Foreign Claims Settlement Commission, Washington, D.C. 20579. For information or to obtain forms, phone (202) 616-6975 or fax (202) 616-6993.