Addition to a workers compensation insurance policy to cover payments to injured employees who are not covered by a state's workers compensation law. This endorsement provides employees who are not covered by the state law a choice of receiving workers compensation benefits or suing the employer. Under workers compensation laws, employers agree to supply, according to a formula, income lost by workers accidentally injured on the job, as well as medical and rehabilitation benefits and death and survivor benefits. In exchange, these benefits are to be the final obligation of the employer to compensate workers, or the exclusive remedy. However, there has been considerable erosion of the exclusive remedy concept since the early 1970s. Workers have been allowed to sue their employers for various types of on-the-job injuries. Each state has its own workers compensation law.