If the other party fails to sign the letter of commitment in good faith litigation, and the facts to be proved lack other evidence, the people's court will not recognize the facts it claims. If the parties refuse to sign the letter of commitment, the judge in charge can clearly inform the parties that they have violated the relevant provisions of good faith litigation, and the acts of bad faith litigation will be recorded and submitted to the local credit information center and relevant administrative departments for the record, which constitutes obstruction of civil litigation. According to the Civil Procedure Law and relevant laws, the people's court will impose a fine of 654.38+10,000 yuan on individuals, detain the unit for 15 days, and impose a fine of 50,000 yuan to 15 days.