Hosted Pre-Auth page enables pre-authorisation requests for merchant needs such
requests are supported by pre-auth terminals only. Approved pre-auth transactions
must be completed using Selfcare System System before they will be settled. Final transaction amount can be adjusted on completion.
Hosted Pre-Auth Page looks for buyer exactly as Hosted Payment Page, it has the same set of fields as Payment Page has, but a different URL should be used:
One thing to note though is that pre-auths don't have the concept of Auto Ready. A pre-auth will always go into a READY state when completed via an XML completion.