Back when I used my home address I "lost" 5 packages in a row. Some I had sent out, some I was expecting. Some even had delivery confirmation and were "confirmed" as delivered to my house (yet I never saw them!). I started using a family member's house as my shipping address and stopped using the PO location to mail things and also started to use delivery confirmation to at least see that it left the dang city. Never had problems again. So yeah, sometimes it CAN be the postal employees (imagine that... like you've never heard of dirty postal workers before). It can also be neighbors. When I reported all this mail stolen the guy who took my report asked about my neighbors (but as I told him, that didn't explain the mail I sent out also disappearing).