German officials have suspended a lawyer’s passport to prevent him from traveling to Iran to attend a proposed conference questioning whether the Holocaust ever happened. Horst Mahler is a former attorney for the National Democratic Party of Germany, a fringe party that political analysts accuse of having neo-Nazi tendencies. He surrendered his passport January 28, according to Radio Berlin-Brandenburg. The decision was made by the German state of Brandenburg. Interior Minister Eike Lancelle said Mahler is “a fanatic anti-Semite.” German passport laws allow passports to be revoked if an individual’s travel could damage national security or hurt the nation’s vital interests. In this case, Brandenburg authorities say they hope to prevent Mahler from damaging Germany’s reputation abroad.