1. If only the name is wrong, both parties can re-sign the IOU, even without re-signing. Just explain the situation on the original IOU, re-sign, fingerprint or seal it, and it can be used as an effective and correct IOU. 2. If a lawsuit is brought to the court, the creditor shall provide evidence to prove that the names of the two persons are the same person, and it is the creditor's responsibility to provide evidence to prove the facts on which his claim is based. If there is no evidence or the evidence is insufficient to prove the facts identified by the parties, the party with the burden of proof shall bear the adverse consequences. According to Article 5 10 of the Civil Code: after the contract comes into effect, the parties have no agreement or unclear agreement on quality, price or remuneration, place of performance, etc. , they can supplement by agreement; If a supplementary agreement cannot be reached, it shall be determined in accordance with the relevant provisions of the contract or trading habits.