Trafigura staff knew about nickel fraud, Gupta says in court document

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Trafigura logo is pictured in the company entrance in Geneva, Switzerland March 11, 2012. REUTERS/Denis Balibouse/File Photo Acquire Licensing Rights Summary Companies Gupta produces chat messages, emails from Trafigura staff Both sides agreed to use wrong commodity codes, Gupta alleges Trafigura trader message said: "Banks will need to (be) kept at bay" LONDON, Dec 5 (Reuters) - Employees at commodity trader Trafigura worked with Indian businessman Prateek Gupta to keep secret a deal to substitute scrap and other low-value metal for nickel, Gupta alleged in a court document released on Tuesday. Geneva-based Trafigura filed a lawsuit against Gupta in February,...