Apology Letters for Colleague

Dear {Recipient},

I would like to offer you my sincerest apologies for {the thing done}. I threw you under the bus when we
should've been a team. I'm really sorry.

You've been an integral part of the company since day one and I've always admired your {characteristics}. Maybe it was jealousy that caused me to behave the way I did, but there is no excuse for what I did and I'll make sure it doesn't happen again.

I hope you can forgive me. I'd love to buy you a coffee to make it up to you. Please let me know your availability this week.

Sincerely,

{Your Name}

Dear {Recipient},

I'm truly sorry you had to put up with my lazy ass at {event/activity} on {date}. We were supposed to work
together but I didn't bother pulling my own weight, and you ended up having to do everything by yourself.
Not only was I lazy, but I was also selfish and immature. I feel really embarrassed when I look back on that day.

Thank you for calling me out on my unacceptable behavior. I want you to know that I've learned my lesson and I'm working to better myself.

Please let me make it up to you by treating you to lunch. Are you free on {date} at {time}?

Sincerely,

{Your Name}

Dear [Name],

I am writing to you to express my sincerest apologies for my insensitivity. I understand that my words and actions have caused you pain and distress, and I am deeply sorry for that.

I understand that my behavior was inappropriate and offensive, and I take full responsibility for it. I know that I should have been more mindful of my words and actions, and I regret not doing so.

I understand that my words and actions have caused you to feel hurt and disrespected, and I am truly sorry for that. I should have been more aware of your feelings and should have been more sensitive to your needs. I should have been more mindful of the impact my words and actions have had on you.

I understand that my behavior was wrong and I take full responsibility for it. I want to assure you that I will work hard to ensure that this does not happen again. I will strive to be more mindful of my words and actions, and to be more sensitive to the needs of others.

I understand that my words and actions have caused you pain and distress, and I am deeply sorry for that. I will do my best to make sure that this does not happen again. I hope that you can forgive me and that we can move forward.

Once again, I apologize for my insensitivity and I am truly sorry for the pain and distress I have caused you.

Sincerely,
[Your Name]