"An open letter is a letter that is intended to be read by a wide audience, or a letter intended for an individual, but that is nonetheless widely distributed intentionally.
Open letters usually take the form of a letter addressed to an individual but provided to the public through newspapers and other media, such as a letter to the editor or blog. Especially common are critical open letters addressed to political leaders.
Letters patent are another form of open letter in which a legal document is both mailed to a person by the government and publicized so that all are made aware of it. Open letters can also be addressed directly to a group rather than any individual.[citation needed]" - (en.wikipedia.org 18.09.2020)
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