As global firms continue to consolidate and merge, considerations of territoriality become more challenging. What is considered allowable transient practice in one jurisdiction may be unauthorised practise of law in other jurisdictions. The ability of law firms to maintain legally distinct affiliates while projecting a ‘one-stop shop’ is under challenge. At the same time, affiliations and the use of partners outside the home jurisdiction may trigger claims of unauthorised practice that can affect the ability to collect fees, as well as issues of attorney-client privilege. Have traditional concepts of what is and is not the practise of law been eroded? This session surveys the field of how alternative business structures and contemporary means of delivery of legal services and whether 20th century notions of unauthorised practise of law can survive the emergence of new and varied legal structures and mechanisms.