Apology Letter For Plagiarism
Dear {Recipient},
I'm sorry I {passed off your work as my own/failed to give you proper credit in my work/etc.}. I didn't think much of it at the time, but now I realize that plagiarism is a serious offense and what I did was very wrong.
I have since {taken down my post/informed my editor of the truth/cited your work as a source/etc.}. Again, I'm really sorry for plagiarizing your work. If there's anything else I can do to make it up to you, please let me know.
Sincerely,
{Your Name}