The Web services paradigm is expected to transform the Web into a distributed application-to-application network. The Web services landscape is in an evolving state with core specifications almost mature and gaining widespread acceptance. Yet for some specific Web service concepts in-development specifications exist. Despite this fact, organizations should start to utilize primary Web service standards to become familiar with their distinguished opportunities in connectivity and interoperability. The principal purpose of our study is to illustrate the challenges of Web services adoption for real business use cases by a sample financial Web service scenario and solution. Keywords Web services, financial Web services, ATM