How To Write A Letter Formally . They're free from spelling and grammatical errors, planned and written with a clear purpose. Instead, begin the letter with the date in the top left corner. Formal Letter Format Editable PDF Premium Printable Templates from premiumprintabletemplates.com For example, you can write “dear mr.james” or “dear dr. It is punctuated with a comma. Formal emails aren’t the time to goof off with experimental font choices.