Private banks with high-net-worth customers see a great potential in mobile information technology to provide more transparency in the advisory process. Previous literature has mainly focused on gathering requirements with regard to mobile banking applications targeted for retail customers or with regard to advisory services in physical proximity. This paper focuses on an mFAS which is designed for the private banking customer segment and facilitates location-independent customer relationships on a tablet. Furthermore, we specify previously established requirements with the Requirements Abstraction Model. In this study, we evaluated the requirements with a focus group involving seven domain experts. The results of this workshop suggest that most of the specified requirements meet the recommended practice for requirements specification. However, the experts only partly agreed that the presented requirements meet the completeness criterion, which guides future research endeavors.