The subject of this contribution is about use of formal specification in order to prove business properties of a mobile agent system. First, we can be described this kind of system by the use of process algebra, in particular the π-calculus language. Then, from such formal specification, we can generate semi automatically automata using an XML transformation. Finally, we compute acceptance graph to validate a formal property. This validation is assisted by the use of a tool such Uppaal from Aalborg university.