Cleaning outsourcing did not sign the contract, and the salary was paid in cash. Can I claim for property change now?

Of course, the labor law clearly stipulates that if the employer fails to conclude a written labor contract with the employee for more than one month and less than one year from the date of employment, it shall pay the employee twice the monthly salary.

You should pay attention to collecting evidence, colleagues' certificates, work and workplace sign-ins, photos, etc., which can prove that you have a labor relationship with the original property.