What type of correspondence should be used for official documentation?

Official letters are the appropriate form of correspondence for official documentation because they adhere to established formatting, language, and tone required in formal communication. These letters provide a clear and professional means of transmitting important information, decisions, or policies, ensuring that the message is taken seriously and preserved for record-keeping.

Official letters also typically include specific headers, formal salutations, and structured conclusions that are consistent with military protocols and standards. This level of formality is essential in maintaining the integrity and professionalism of communication within the Marine Corps and in dealings with external entities.

In contrast, casual emails, informal notes, and text messages lack the required formality and structure necessary for official communication. These formats do not adequately convey the seriousness of the content, may not be taken as seriously, and are less suited for documentation purposes due to their informal nature and potential for misinterpretation.