I don't know how their mail system works, but my mailman doesn't ring my bell unless there's a package "I have to sign for".
We know the bombers came from several countries. Do her language capabilities cover all of them?
Perhaps a lot of packages come and go? I wish we could have kept them under survelance for a few months. We probably missed a bonanza. I trust the "boys" are keeping track of others in the local group.