Va. Code Ann. § 55.1-1207

If the landlord does not sign and deliver a written rental agreement signed and delivered to him by the tenant, acceptance of rent without reservation by the landlord gives the rental agreement the same effect as if it had been signed and delivered by the landlord. If the tenant does not sign and deliver a written rental agreement signed and delivered to him by the landlord, acceptance of possession or payment of rent without reservation gives the rental agreement the same effect as if it had been signed and delivered by the tenant. If a rental agreement given effect pursuant to this section provides for a term longer than one year, it is effective for only one year.