In order to share a Device, first you must set up a Contact in remote.it. Click on "Contacts" in the left-side menu, then "Create Contact":
Fill in the Contact details in the dialog which appears:
Available languages include English and Japanese and control the language used for notification e-mails.
Fill in the details and then click on "Create Contact".
Next you will see a new entry in the Contacts list:
Now, once your contact is a remote.it user, you can share and transfer devices to them.
Notice that for this Contact, the Account column indicates "no". This means that the e-mail "email@example.com" could not be found as a registered remote.it user name. Until an account exists with the specified user name, sharing cannot be performed.
To invite this user to create a remote.it account, click on the "Create Account" icon:
Click on the checkbox in the dialog which appears, then click on "Submit":