W. Va. Code § 23-4-1a: Report of injuries by employee.

Every employee who sustains an injury subject to this chapter, or his or her representative, shall immediately on the occurrence of the injury or as soon thereafter as practicable give or cause to be given to the employer or any of the employer’s agents a written notice of the occurrence of the injury stating in ordinary language the name and address of the employer, the name and address of the employee, the time, place, nature, and cause of the injury, and whether temporary total disability has resulted from the injury. The notice shall be given personally to the employer or any of the employer’s agents, or may be sent by certified mail addressed to the employer at the employer’s last known residence or place of business.