What are the HSM requirements for PTX? Cloud Payments Expert March 21, 2019 11:44 Updated Follow HSM-form.docx 60 KB Download Related articles What is a HSM and how does it work for PTX? What are the onboarding requirements for PTX DDM? What are the onboarding requirements for PT-X? How to submit to Bacs - Direct smartcard and CSM and Indirect How do I contact Bottomline?