Call related invoices may be generated and applied to calls and related services especially in certain countries with dynamic tax models and specific entity authorization rules and other strict requirements for generating such invoices. One example method of operation may include identifying a call session being initiated by at least one call party device and retrieving account information of the at least one call party. Next, a preliminary invoice is generated based on the initiated call session including the account information, and the invoice is then updated to include details of the call session once the call session has ended.