To pass both a Fax and Email in the GetCard Supplier Address Information you would do so like the below, and this is preferred for the Connect matching process:
You can however send through as above without the fax field, or as below with an email address in the Fax field where a fax is not available:
Send Fax Request:
The FaxNumberOption in the Send Fax Request can be set as "SupplierFax" which uses the supplier fax number provided in the supplier information of the GetCard request, or "DeclaredNumber" which is given in the SendFax request.
When receiving a SendFax request we will attempt to send by the hotels preferred communication method (including API/Secure email/fax/email) where a hotel has registered for Connect, and the Supplier information provided within the GetCard request has matched to the hotels registered details.
Where the hotel has not registered/matched Connect you can use SendFax to deliver emails or specified fax by setting the FaxNumberOption=DeclaredNumber and the DeclaredNumber attribute value to the merchant’s email address or fax number.
Send Fax XML:
<FaxInstruction DeploymentID="123456" FaxType="Hotel" FaxNumberOption="DeclaredNumber"
DeclaredNumber="firstname.lastname@example.org" FailedFaxEmailAddress="email@example.com" />