The U.S. Postal Inspection Service said it...

The U.S. Postal Inspection Service said it is investigating allegations that Dun & Bradstreet Corp. defrauded customers who buy its credit information. Joseph Clark, the Cincinnati postal inspector handling the investigation, said he has questioned several Dun & Bradstreet employees but declined to give details. Clark said the investigation developed from allegations in a suit filed in U.S. District Court here by a Dun & Bradstreet sales representative who alleged that the company engaged in misrepresentations to induce customers to buy more credit-reporting services than they needed. The company has denied the allegations and said it has begun an internal investigation.