In the US and Canada, many carriers do not ship to p.o. boxes. The reason is that only USPS is allowed to ship to p.o. boxes. The rest of the carriers need to use USPS for the final stage of delivery
or are restricted from shipping to p.o. boxes. It is important for e-commerce businesses not to allow their customers to choose shipping to p.o. boxes as a shipping option at the checkout.
Let's have a look at how to restrict shipping to post office boxes with Calcurates, shipping software for e-commerce stores. Once you log in to Calcurates, navigate to the shipping segment and choose your preferred address options HCR, RFD, P.O.B, Box, PO., P.O, and Route.