If the airfield is not registered or certified you CANNOT issue NOTAMS. The only way to get something into a NOTAM is to contact CASA who can then send it to AirServices. CASA rarely approves of issuing a NOTAM for something as minor as no fuel. We couldn't even get a NOTAM through about our main runway being closed for a day. Besides, not being able to fill up means you cannot fly and thus improves safety.