This article contains a bare‐bones HTML form, utilizing all payment types. This form can be static, with the exception of the <InSessionID> hidden form field. The value of this field must be generated using your preferred web scripting language, in conjunction with the set_session or set_session_auth API methods. The form action, mode hidden field, and <client_no> hidden field serve as examples only. The actual values must be modified to suit your implementation.