If you are writing in Node JS, specify the "to" as follow:

var body = {

to: [{'phoneNumber': 'Recipient Number', 'name': "Name of your Recipient"}],

faxResolution: 'High',

coverPageText: "This is a demo Fax page from Node JS"

}

Hi,

In Java ring central API there is no method provided in MessageStoreCallerInfoRequest to set recipient name. However we are passing from phone number in the request and your number will have all those details like name etc. Might be ring central will take of this internally.

You can get your answer in the link with similar question :

https://forums.developers.ringcentral.com/questions/128/how-to-create-a-fax-with-recipient-information.html

Also, you can do from the desktop application as per following:

https://support.ringcentral.com/s/article/Fax-Create-a-Custom-Fax-Cover-Page-RingCentral-Phone?language=en_US

Hope that helps