Signing someone else's name without a nurse's qualification certificate has an impact. If someone else pretends to be my signature without my knowledge, I won't ratify it, I won't bear legal responsibility, and the signatory will bear the responsibility; If it is approved, I should bear the responsibility. Signing on behalf of the agent is the behavior. If I don't know, I have no right to represent and I don't bear legal responsibility. However, if I know that someone else signed my name without denying it, or that I ratified it, the signature is binding on me and I should bear legal responsibility.