A system for validating a correction to map data for a geographic location, the system comprising: a processing resource; and a navigation device; wherein the processing resource comprises: a user request generator that is configured to generate a user request for transmission to the navigation device; a transmitter for transmitting the generated user request to the navigation device; and a receiver for receiving a user response from said navigation device; and the navigation device comprises: a receiver for receiving the user request transmitted from the processing resource; a user request module configured to present said received user request to a user of the navigation device; a user response module for capturing a user response to said presented user request, and a transmitter for transmitting said captured user response to said processing resource.