605.3 Communications from the U.S. Copyright Office
The registration specialist assigned to the claim will communicate with the applicant if he or she has questions regarding the registration materials.
The specialist may communicate by email, phone, fax, or letter. However, if the applicant provided an email address in the application, the specialist will use that address as the primary means for his or her communication.
In all cases, the specialist will provide the applicant with appropriate contact information for responding to his or her communication.