As with all street maps, occasionally the information shown may be outdated or incorrect. The address data in the Roadmap view and Street Maps overlay are provided by Google Maps and Here Map Creator, depending on the MapBrowser you are using. Nearmap has no ability to edit them, so you would have to notify the provider directly, as explained below.
The easiest way to correct the map is to find the location of interest in Google Maps and click Send feedback at the bottom of the window as shown below. Then just follow the instructions provided.