Mumbai - The credibility of the Railways under the credible leadership of Railway Minister Suresh Prabhu has suffered a jolt. A letter of the Railways has revealed that the PRS, booking department, parcel department and cash department of the Railways have not managed the proper record of old currency notes being transacted after the decision of demonetisation. This has given a chance to the opposition parties to criticize the government. Congress spokesperson Raju Waghmare has criticised the government. Madhu Kotian, president of Mumbai Commuters Association, has also criticised the Railways on this. This letter has been written by the Vigilance Department head to the DRMs of Mumbai, Pune, Bhusawal, Surat and Nagpur zones. This clearly brings to fore the fact that black money is being made white by the Railway officials.