In civil litigation, original evidence and new evidence are distinguished according to the source of evidence. The original evidence is the evidence directly derived from the objective facts of the case, which is what people usually call "first-hand materials". Such as the original contract. According to the experience of judicial practice, the original evidence is more reliable than the transmitted evidence.
In the criminal procedure law, the original evidence is relative to the new evidence. The former refers to the evidence directly derived from the facts of the case, which has not been copied or relayed, and is the first-hand information. Rather than directly from the facts, it is handwritten evidence. For example, the murder weapon at the crime scene is the original evidence, while the facts of the case relayed by the people at the scene are the transmitted evidence.