Purpose: The paper aims to present a solution which makes it possible to control and audit organizational transactions in real time, helping to determine the degree of reliability with which they are carried out, mitigating the organizational risk. This auditing is made at a very low level of organizational transactions executed and supported exclusively in a digital format, contrary to what happens in most monitoring of transactions, which occurs at a high level. Moreover, it describes the conceptual architecture of the solution, its components and functionalities as well as the development and technical issues which should be taken into consideration on the deployment and evaluation of the solution. Design/methodology/approach: The work follows the design science methodology. It presents the problem and motivation of the investigation, the solution design and how it is being deployed. Furthermore, it presents the expected results based on the proposed architecture and on the results which are currently being achieved with the prototype implementation. Findings: The prototype is being put into practice, thus the gathering of results and their evaluation is not yet complete. However, preliminary results are really satisfactory and very close to those expected and enumerated. Originality/value: The research contributes to a new vision of organizational auditing focused on assurance services in transactions executed and supported in a digital format in compliance with the formalisms of a business ontological model of organizational transactions.