Copies can be used for handwriting identification, but the remarks should be clear. According to the law, the copy will only be used as evidence unless it is approved by the other party. At present, only some areas can take notes to identify the replica. Generally speaking, the copy shall not be used alone as the basis for determining the facts of the case. Other evidence is needed to prove it and form a complete chain of evidence. Or the other party approves it, it has legal effect. Usually, the court needs the original for handwriting identification, but the copy is not enough. Because copies can be compiled. However, if there are enough words on the copy and the signature of the party concerned, you can contact the appraisal institution for appraisal. When doing the appraisal, you need to provide enough written information about this person. If the handwriting material is a copy, the conclusion of positive handwriting identification means that it can be identified as "the same as someone's handwriting, but not someone's handwriting".