You can apply to the labor dispute arbitration Committee of the local human resources and social security bureau for arbitration and demand payment of wages. If a labor contract is not signed, you can ask for double salary without signing a labor contract. If the termination of labor relations is based on unpaid wages, you can also ask for economic compensation. Advantages: In addition to wages, you can also advocate economic compensation and double wages. , and generally can be finally solved; Disadvantages: applying for labor arbitration is a labor lawsuit, which requires more procedures and professional guidance.
If there is an iou, you can bring a lawsuit directly to the court to demand payment of the wages in the iou.