This category of letters is for the purpose of providing “general” apology letters to help get started in the apology process. Usually, a letter may not be the best way to go, but a face-to-face meeting would be the prime way to express apology or deal with personal difficulties with others.
Refer to Matthew 18 for further guidance.
It is definitely a category you would not want to use verbatim but modify them according to your specific needs.
Dear
I wanted to take a moment to send you a note of apology for missing the recent band recital at the school. I know I had shared with you my intentions of being there for this very special occasion in your life, yet due to circumstances beyond my control, this did not happen.
Dear
Warm Greetings!
I wanted to take a moment to send a note of apology for missing our meeting scheduled for this past (Tuesday) at 11:00 AM.