Thanks notzier! After much back and forth, tech support couldn't fix it, so I just removed the call to pipe.php. So for now, ticket creation is only possible through the form. I've actually been moving towards this setup as a preference anyhow, because I find it extremely helpful to have a customer's phone number and because email can be so unreliable at times. That said, this also interferes with the osTicket threading having no email functionality so it remains to be seen how this new setup works out. Thanks again!