Okay kiddo, so there was this letter that was supposedly written by a lady named Jessica Mydek. But, unfortunately, it turned out to be a fake, which means that someone made it up instead of it being true.
Some people thought that the letter was real because it talked about some serious topics like bullying and suicide, and they wanted to believe that someone brave enough had written it. However, some experts found out that the letter had actually been created by someone who wanted to create a hoax, which means to trick people into thinking something is true when it isn't.
It's never a nice thing to lie or deceive people, and it was wrong for someone to create this fake Jessica Mydek letter. We should always try to be honest and truthful with each other, even if it can be tough sometimes.