WHMCS Domainbox API Module Updated 2014
If you are using the Domainbox API with WHMCS you may have noticed the following error:
Error: Invalid Parameter: Contact 'Registrant': Address Telephone '+44.+44.1234567890' is invalid
To solve this simply download the "domainbox.php" file and replace the current file located in /path/to/whmcs/modules/registrars/domainbox/
Be sure to set the correct permissions on the file i.e 644 with suEXEC.