Apology Letter for Not Attending

Dear {Recipient},

I am so sorry that I was unable to attend {name of event}.

You might laugh when you hear the reason I was unable to go. {Story about not attending} Crazy, right? I know, I know. That could only happen to me.

I promise, at a future {name of event}, I will be there with bells on, ready to make up for all I missed this time around. So don't hold this against me, okay? I'll be expecting my invitation when you do this again.

Until next time,

{Sender}

Apology Letter For Hurt Feelings

Dear {Recipient},

Let me begin with, “I’m sorry.”

I’m sorry for {state action}. I can see that my behavior and attitude was hurtful and totally unnecessary. You did not deserve to be on the receiving end of my actions.

I am normally not like this. While I am not excusing myself from my {unprofessional/immature} actions, I believe I acted the way I did because of my {fatigue, bad day, etc…}.

I hope we can continue to {work together, maintain our friendship, etc…}. If you have any thoughts on this matter, please feel free to contact me at {phone/email}.

Sincerely,
{Sender}

Apology Letter for Coming Late

Dear {Recipient},

I know how awful it is when you're counting on someone and he/she lets you down, so that makes it even harder for me to try to find the words to apologize for my late appearance at the {party, business meeting, etc.}.

I am aware that you expected me to be there at {HH:MM}, and that I showed up late, which embarrassed both of us. I never enjoy putting anyone in a situation like that, and I am truly sorry that you had to endure those moments of wondering where I was. And I regret that you had to try to make excuses for my tardiness.

I hope I can make this up to you in the future. Please give me a call as soon as possible so that we can talk, and so that I can apologize in person.

Regretfully,

{Sender}