The United States Treasury issued a check for $7.2 million to purchase Alaska from the Russian Empire in 1867, the largest real estate transaction in history. The check is an example of an historical legal document and is a rare example of a canceled Treasury check.

The canceled check for the purchase of Alaska is an example of a primary source document. A primary source document is one that is created at or near the time of the event or occurrence. Primary source documents have the highest level of reliability and accuracy because they were created during, or shortly after, the events or occurrences they describe.

In terms of history, the Treasury check is an example of a primary source document that can be studied to gain an understanding of the history of the purchase of Alaska. The check itself is an example of economic history, as it was the monetary payment used for the purchase. The amount of the check, and the name of the payee, is evidence of an important event in American history.

In terms of the legality of the purchase, the canceled check is also an example of a legal document. The check was issued and accepted in accordance with the Treaty of Cession between the United States and the Russian Empire in 1867. The canceled check is evidence that the purchase of Alaska was legally executed and was accepted as an official act between the two countries.

The canceled check for the purchase of Alaska is thus an example of both a primary source document and a legal document. The check is a reminder of a pivotal moment in American and Russian history, and it is an important piece of the legal history of the purchase.