Abstract: An originating user captures an original image with mobile equipment. The image is displayed on the originating user's mobile equipment with first annotations. First data information (R1) including the time and the location of the mobile equipment together with information that the first annotations has been displayed is sent to a server. The originating user transmits the image to a second equipment of at least one second user. The image is displayed on the second equipment. Second annotations are displayed to said second user in combination with said image. Second data information (R2) including the time and the location of equipment of the second user together with information that the second annotations has been displayed is sent to the server. The server determines from the location and/or time whether said image is an original image captured by the originating user, or a transmitted image displayed to a second user.