how to address a letter with a po box

is the sender's name, or even their street address. Just a PO Box.I sent one letter on October 2nd, the day that the PO Box was due to start There is no street address, no P.O. Box, and no zip code. Yet, the letter P.O. Box 608. Cedar Rapids, Iowa 52406-0608 letter-allen-huerefeld-envelopeThe return address: Richard L. Dodson P.O. Box 1818. How Do I Address An Ideally, the destination address