As the monarch, Queen Elizabeth II doesn't have to adhere to many of the rules that people outside the royal family are expected to follow. Due to her standing, she's not required to have the usual proof of identification that many people need for flying and traveling. However, she does have one document that could be used for identification purposes.

According to the Latin Times, it is not necessary for the Queen to have a passport since she wouldn't be issued one in the first place. This is not a luxury that is even afforded to the President of the United States, so the Queen is in a league of her own when it comes to bypassing the typical protocol for travel. Additionally, all other royals, including the Prince of Wales and Duke of Edinburgh, have passports.

"As a British passport is issued in the name of Her Majesty, it is unnecessary for The Queen to possess one," states the royal family's website.

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Another piece of identification that the Queen is not required to have is a driver's license. The reasoning behind this is similar to the one behind her lack of a passport, all licenses are issued under her name. In fact, she is the only person in the United Kingdom who doesn't need one to drive.

Per the Latin Times, she did, however, have a license at one point in 1945 before she was crowned in 1953, but it was later given to her private instructor. Eventually, it was sold to the Adjutant General's Corps Museum.

It is said that the one official document she has that could be used to identify her in other countries is her marriage certificate, which she obtained in 1947 when she married Prince Philip. However, it is highly unlikely that she would ever need anything aside from her physical presence and highly-identifiable fashions to prove who she is.

Queen Elizabeth II
Queen Elizabeth II arrives at Tweedbank Station on Sept. 9, 2015, in Tweedbank, Scotland. Getty Images/Chris Jackson