Once I found out their status, I replied saying “No sorry I am not willing to give any invite by letter. Did you already join Australian WWOOF before getting a visa?
I think you should wait till you have your visa before contacting any hosts.”
I doubt these people will get a visa as they would be a big risk of not going home again. It sounds like they would really be looking for a sponsor. People the world over are desperate to get to Australia and will try all kinds of ways to try. I was just surprised to see they were joining wwoof as a possible way in.
I won’t be getting involved in that of course, just curious to see if others have come across this.