A method for detecting duplicate records generates a checksum (222) for each record and compares the generated checksum (222) to checksums stored in check files (30). In a particular application, a system (10) for processing call detail records utilizes a duplicate check module (28) that detects...http://www.google.co.uk/patents/US5680611?utm_source=gb-gplus-sharePatent US5680611 - Duplicate record detection
