There is: abandoned=*: i'm aware of

I walked it yesterday, there are no signs of and old path appart from some animal path traces. I can imagine that there was one in the past. But without talking to the landower it's problematic to have it in osm without according tagging. as many apps will route people up there. I wish there would be a direct path from Unterseen up, but we cannot just tag pathes even old ones in the hope it'll be accepted by todays land owners. If you wan't to leave them in tag them with abandoned: or access=no to avoid conflicts

This path does not exist. As it is on private property it should be deleted.
I'm courious, where does the information that there is a path come from?