You need to ask the operator of garmin.openstreetmap.nl (I believe their is even a dedicated forum), for example on this [forum](http://forum.openstreetmap.org/viewforum.php?id=26), address support in garmin files depends on how the resp. provider converted the OSM data.data and there is no simple, general answer.

You need to ask the operator of garmin.openstreetmap.nl (I believe their is even a dedicated forum), address support in garmin files depends on how the resp. provider converted the OSM data.