When you make a formal statement as part of a court case, it can be used as evidence. This means it can be used to help decide things before the trial, just like if you were speaking in court. You will also be treated as if you had already said those things before, when you get to the trial.

If you include things like documents or objects with your formal statement, they will be treated as if you had shown them in court. This is because you referred to them in your statement as something important to your case. These things will be considered as part of your statement, and can be used as evidence in the court case.