I just googled the form to make sure it was what I thought it was. It definitely is not the wisest thing to do as immigration do data matching with Centrelink. They can use this as a reason to refuse the permanent partner visa when the time comes.I have been to Centrelink 10 days ago and filled out a mod S separation form without giving much thought to it. Probably not the wisest thing to do. Now I regret that. I wonder if it will have an adverse affect on immigration..