Validis is a web based service which detects anomalies in accounting data in very much the same manner as a spell checker finds errors in a text document. The word itself is derived from a concatenation of Validate and Discover. The primary user base is among accounting professionals both within the financial community of corporate and SME business and across professional accounting practice. It provides a means to identify out of line data that is incomplete, invalid, inconsistent, or inaccurate, an analysis collectively tagged the ‘Four Is’.