Legal analysis: the contract with forged signature is invalid. If it has the purpose of illegal possession and the amount is large, it is suspected of contract fraud. According to the prohibition of contract establishment and the conditions that must be met, then the sales contract established with forged signature does not meet the statutory conditions for establishment first, so it will not have legal effect. If the injured party is required to perform the contract, it can actively advocate signature infringement. However, if you want to recognize the transaction, you can also ratify it, and unlike the ratification restrictions of people with limited capacity for civil conduct, the injured party here can ratify the contract at any time.

Legal basis: Civil Code of People's Republic of China (PRC).

Article 148 If a party causes the other party to commit a civil juristic act against its true meaning by fraudulent means, the aggrieved party has the right to request the people's court or an arbitration institution to cancel it.

Article 149 If a third party commits a civil juristic act against its true meaning due to fraud, and the other party knows or should know about the fraud, the defrauded party has the right to request the people's court or an arbitration institution to cancel it.