The literature is fertile in studies that examine the determinants of internal and external auditors’ adoption of computer-assisted audit tools and techniques (CAATs), often ignoring their practical effects on audit quality and organizational performance. This study provides novel evidence on the type of CAATs used by internal auditors, tests the effect of their adoption on corporate sustainability, and explores the moderating effect of organizational characteristics. In this paper, we used data from Portuguese internal auditors collected through a survey, whose research hypotheses were analyzed by the partial least squares–structural equation modeling technique. We found that internal auditors use CAATs moderately in the exercise of their tasks. The results of our study show that there is a strong and positive effect of the use of CAATs by internal auditors on fraud detection in the purchase-to-pay business process, and that the intensity of this relationship is not influenced by the type and size of the entity. This study complements previous research and provides support to practitioners’ decisions that can boost the use of CAATs in internal auditing to make organizations more sustainable.

Purpose -This study analyzes citizens' behavior in relation to sales invoices in the context of collaborating with the Portuguese Tax Administration on tax compliance. Specifically, we address two research questions: i) we identify the determinants that lead to individual taxpayers requesting invoices with(out) a tax identification number, and ii) we identify the sociodemographic characteristics that are associated with these behaviors.Theoretical framework -This research draws on the insights of tax compliance and empirical work on the motivations for taxpayers to request a sales invoice.Design/methodology/approach -The study uses the survey method and data were collected through a questionnaire made available on an electronic platform. The study applies principal component analysis and cluster analysis to a sample of 240 Portuguese individual taxpayers.