[1] On December 9, 1847, the Grand Duchy of Mecklenburg-Schwerin signed the Declaration of Accession to the Stipulations and Provisions of the Treaty with Hanover on June 10, 1846.

The agreement was signed in Schwerin by the Mecklenburg-Schwerin Minister, L. de Liitzow, and U.S. Special Agent Ambrose Dudley Mann.

[2] On November 26, 1853, the Grand Duchy of Mecklenburg-Schwerin signed the Declaration of Accession to the Convention for the Extradition of Criminals, Fugitive from Justice, of June 16, 1852, between the United States and Prussia and Other States of the German Confederation to provide for the "reciprocal extradition of fugitive criminals, in special cases.

"[3] In 1871, the entirety of the Grand Duchy joined German Empire and continued relations from Berlin under a single government.

[1] This article incorporates public domain material from "A Guide to the United States' History of Recognition, Diplomatic, and Consular Relations, by Country, since 1776: Mecklenburg-Schwerin".