Difference; Application and formal letter

[Tom]

Hi,

Is there any difference between an application and a formal letter? For example: " A two-day leave..." will be an application to the Principal or a formal letter?

Tom

[Yankee]

Based on the tiny little bit of context you gave , it sounds like "an application to the principal" would be a verbal request rather than a written request (a formal letter).

Amy
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Amy
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ESL teacher, translator, and a native speaker of American English