The manuscript, written in 1527, was identified among documents signed by Cortés, who was appointed governor of New Spain by the Spanish crown prior to its disappearance. Archivists noted its absence when the collection was cataloged on microfilm in 1993. The FBI, working closely with the Mexican government, utilized open-source research to locate the document, although specific details on its previous ownership remain undisclosed.

According to Special Agent Jessica Dittmer, the manuscript, bearing a wax number indicating its removal during the 1985-1986 cataloging period, will enhance Mexico's understanding of its history. She emphasized that pieces like this are considered protected cultural property, vital for comprehending historical narratives. With ongoing political tensions between the US and Mexico, the repatriation serves as a reminder of the importance of safeguarding and returning cultural heritage to its rightful owners. The FBI plans to continue its efforts to locate and return the remaining pages from this historical collection.