W. Va. Code § 14-1-18b: Regulations applicable to debt collectors.

The commissioner of finance and administration shall promulgate rules and regulations for the determination and regulation of responsible licensed and bonded debt collection agencies and other responsible agents for collection. The commissioner shall determine the collection fees to be paid to any such agency or agent, which fees shall be a percentage of the amount of the debt recovered, but the commissioner shall not under any circumstances pay any agency or agent a fee of more than fifty percent of the amount of the debt recovered.