People suffering from early stage dementia still have the capability to perform instrumental activities of daily living (iADL) such as the preparation of meals, if reminded to do so. The features available in everyday technology such as mobile phones have been exploited to support increased independence of the people with dementia and to provide lower carer burden. The mobile phone-based video streaming reminder system (MPVS) delivers video reminders via a mobile which have previously been recorded by the carer. To date it was not possible to ascertain if the reminded task was actually performed or not. This work presents a case study which aims to assess task compliance of a reminder system within a 'sensorised environment. (5 pages)