Does Standard Flat Rate Shipping Service deliver to po box?

Question

Does Standard Flat Rate Shipping Service deliver to po box?

Answer 1

Can all mail classes be delivered to a Post Office Box?

All mail classes and services may be sent to a P.O. Box, if the item requires a signature a notice will be left. If the second attempt is unsuccessful the item will be return to sender after the required number of postal days have elapsed.

This information came directly off of the www.usps.com website.  You can click on the link below in the source section.  I cut and pasted it there in the event you wanted to visit the page directly.