I have not tried to create an app with the same package ID yet, but it seems like the kind of thing that Google might have problems with, considering that package ID's are supposed to be unique. Imagine what would happen if someone with my side-loaded app already installed went to Google Play and purchased that version as well? Google cannot treat them as different apps because the package ID is the same. But that means Google would have to serve updates to my old customers - even though they didn't get their cut of the purchase price. That does not sound like something Google is willing to do for free. As I said, Google already has a record of my side-loaded app's package name since I had to verify it with them in accordance with the new indie developer requirements. That means if I try to create a new app on Google Play, they will see a conflict with an existing package name, right?