@Alan Collett Hi Alan, I've submitted the 870 visa application for my mum on 1st July then requested for Health undertaking Form 815 on 10th Aug and we uploaded to IMMI on 12th Aug, then no more updates till now. On immigration web site shows 90% of applications: 46 days, but I been waiting for more than 100 days already, I've tried to call and email but it doesn't help at all. Can you give me some advice that is there anything i can do to chase them? Thank you.