W. Va. Code § 20-2-21
Each trapper shall electronically register each beaver and otter, or each pelt, to a game checking station or representative of the division within thirty days after the close of a legal season. A game tag number shall be issued to the person and recorded in writing with the person's name and address, or on a field tag, and shall be affixed to each otter and remain attached to the animal or pelt until it is processed into commercial fur. A game tag number for each beaver shall be issued to the person and recorded in writing with the person's name and address and either attached to each beaver or pelt, or the tag number shall be retained by the person in possession of the beavers. The game tag numbers shall remain attached to the animal or pelt or retained by the owner until it is processed into commercial fur.
W. Va. Code § 20-2-21