title: Postal Code error PayPal (PHP)
body: <p>I want to integrate PayPal on my website with PayPal integration wizard. I use PayPal API and expresscheckout.php, paypalfunctions.php generated by PayPal Integration Wizard. </p>
  
  <p>I wrote form to fill billing data to post to PayPal, but it returns Error Code: 10712, which mean is "There's an error with this transaction. Please enter a valid postal code in the billing address." and recommended solution is " Please enter your five digit postal code in the billing address. " 
  Okay, that's right, but I tried to use 95131 which is valid ZIP from California, and it's five digits. </p>
  
  <p>What could be the problem? Any suggestion ?</p>