All certificates of acknowledgment to deeds and other writings taken and certified by a notary public or other officer originally duly authorized to take acknowledgments in any city or county that consolidated with other political subdivisions or became a city, as the case may be, prior to the normal expiration date of the commission of such notary public or other officer are hereby declared to be valid to the same extent they would have been valid as if such notary public or other officer had been commissioned for such consolidated political subdivision or city to which any such county was transformed.
Va. Code § 55.1-639