A premarital agreement must be in writing and signed by both parties and contain an acknowledgement that both parties have had an opportunity to consult with separate legal counsel. It is enforceable without consideration.
W. Va. Code § 48-1A-201
Formalities
Known as the Uniform Premarital Agreement Act
The act spans §§ 48-1A-1001 to 48-1A-901 (11 sections).
Official source: West Virginia Legislature. Reproduced from public-domain West Virginia statutes; confirm against the official source for the current text. Not legal advice.