1802.9 (D) Reexamination of the Deposit Copy
In some cases, it may be necessary to compare the information provided in the application for supplementary registration with the deposit copy(ies) which were submitted with the application for the basic registration, particularly if the supplementary registration changes the publication status of the work, adds additional authors to the registration record, or makes changes to the certificate of registration in the fields/spaces marked Author Created, Limitation of Copyright Claim, Nature of Authorship, or New Material Added to This Work.
If the U.S. Copyright Office does not have the deposit copy(ies) in its possession, or if the deposit copy(ies) cannot be found within the collections of the Library of Congress, the specialist will ask the applicant to submit a replacement deposit together with a written declaration confirming that the replacement is identical to the deposit copy(ies) that were submitted with the application for basic registration (including the copyright notice if the work was published in the United States before March 1, 1989).