Version 1.4, 2017-02-28
Secure XML API Integration Guide, version 1.4, 2017-02-28.pdf (1.2 MB)
Version 1.2, 2016-12-01
«Secure XML API Integration Guide», Version 1.2, 2016-12-01.pdf (1.8 MB)
The source: https://www.securepay.com.au/_uploads/files/Secure_XML_API_Integration_Guide.pdf