Is it illegal to sign a white note after the car of a state-owned enterprise is repaired?

Not illegal. It is not illegal for state-owned enterprises to sign white stripes after repairing cars, and it is easy to receive money for repairing cars. The driver belongs to the employees of the company, and the driver's signature belongs to the duty behavior and has legal effect. With the maintenance fee document signed by the driver, the unit shall pay the maintenance fee. State-owned enterprises refer to wholly state-owned enterprises, wholly state-owned companies and state-owned capital holding companies that the State Council and local people's governments perform the responsibilities of investors on behalf of the state respectively.