I never heard about this before but let me be naive. It may indicates your 820 visa is granted? Did you check VEVO?I have lodged my Partner Visa 820 from PMV and received via email the Bridging Visa Grant though it will not be in effect until my PMV expires. Today (a week after lodgement), Immi has returned my docs via post mail with a small note "with compliments NSW Partner Processing Centre"
I am not sure what does this mean? Anybdy with the same case of returned docs?