Rudel and his men built an illegal business, disguised as a haulage company, around this discrepancy in exchange rates by smuggling large sums of money from one zone to another, buying and selling currency with a profitable margin. Wolfrum states that his contact with Rudel ended in 1948 after Rudel had left for Argentina.
Rudel and his associates engaged in an illicit enterprise, pretending to be a transportation company, to exploit the difference in exchange rates by smuggling money between zones. Wolfrum's contact severed ties with Rudel in 1948 following Rudel's departure for Argentina.