Originally Posted by
kale73
Right now I'm waiting to hear from the USPS why my application left the USPS Philadelphia Distribution Center on the morning of February 8 but was apparently never delivered to the Passport Processing Center in Philadelphia.

Is your application showing up in the State Dept system, and was it expedited or regular?
Like any other high volume recipient, it's almost certainly caller service and not a physical PO Box. My understanding is the distribution center *is* where that mail terminates, so it's probably just a missed scan. The actual lockbox facility that processes those applications is actually in northern Delaware, not Philly.