I’m writing this letter with a heavy heart and a deep sense of guilt. I have committed an act that I am not proud of, and it’s time to come clean. I have stolen [describe what was stolen] from you, and I can’t express how sorry I am for betraying your trust and breaking the law.
I understand that my actions have caused harm, both materially and emotionally, and I deeply regret my lapse in judgment. My behavior was unacceptable, and I’m committed to making it right.
To start, I will return the stolen item to you as soon as possible. I also plan to [describe any other remedial actions you plan to take, such as paying for any damages, etc.].
I hope that, with time, I can earn back your trust and make amends for my actions. I understand that this confession doesn’t erase what I’ve done, but I hope it’s the first step in the long process of making things right.