California Labor Code Section 2751 calls for written contracts to be provided by employers to those employees who earn commissions. It is a law that makes the commission-earning employee aware of the pay structure and the terms in which he or she has to work. In case you have not gotten any written commission agreement with your employer, or even the terms of your contract are not being honored, you can seek the assistance of a lawyer to represent you in asserting your right and getting paid fairly at https://consumerattorneys.com/article/california-labor-code-section-2751.