Never heard of a company that didn't accept a billing address for a credit card with a PO Box! First I tried our phys. Address and that didn't work (I didn't think it would but it was a longshot) then I slightly chged it to 317 Box vs. PO Box 317 and it was accepted and I received a confirmation and invoice number. Then the next day, a letter of cancellation of order due to security issues. UNBELIEVABLE!