Final answer:
An appeal letter should not use a font size smaller than 10 points; a readable font like Times New Roman size 11-12 is recommended. Proper formatting, such as spelling out dates and using bullet-points, is important for clarity.
Step-by-step explanation:
An appeal letter should be formatted in several key ways to ensure that it is professional and effective. However, one method of formatting is not appropriate for such a letter. Using a small font size, no larger than 10 points, is not recommended. Font sizes for important documents, such as an appeal letter, should typically be between 11 to 12 points and in a readable font style, such as Times New Roman, to ensure clarity and professionalism.
Appropriate formatting includes spelling out all dates, using bullet-points for readability, and ensuring proper grammar and spelling throughout. Additionally, spell out procedure codes when applicable to make sure that all information is clearly understood.