A hard-copy letter of appeal should be written in the business letter format, while an email should be sent in the same format but without the heading (your return address, their address, and the date).
Appeal Letter Writing
The first paragraph should introduce yourself and explain why you are writing the letter. Although it may be difficult, be sure to keep your tone and emotions in check to show that you can present an objective viewpoint. Keep the first paragraph as concise and clear as possible so that the reader can immediately understand its urgency.
The next paragraph(s) should narrate the account of what happened, and why your appeal should be granted. Include all the necessary facts in order to legitimize your case. You can start by referring to your handbook or guidelines as member of that particular group or institution. Also, provide specific times and date when particular events occurred. To make your letter more reader-friendly, use bullet-points every time you need to enumerate. After doing this, refer to testimonials from people related to your work, transcript of records, and medical certificate, if necessary.
The last part should summarize everything you have stated above. Repeat the necessary points that need to be elucidated. Also include the contact details and where you can be reached. Close out the letter by thanking the reader for their time.
Also see: Sample Letter of Appeal