True or False: The designation of an agent for service remains in effect for three years from the filing unless revoked.

The statement is true because the designation of an agent for service in New York is indeed valid for three years from the date of filing unless it is revoked by the principal who designated the agent. This means that unless an entity or individual takes action to revoke that designation before the three-year period ends, the agent remains authorized to accept service of process on behalf of the principal.

This provision is essential in maintaining a clear line of communication and responsibility between the appointing entity and the designated agent. The validity period is specifically established to ensure that the designation does not extend indefinitely, requiring regular updates to ensure that the agent is still acting on behalf of the principal and that the information is current.

The other responses do not accurately reflect the rules governing the designation of an agent. The requirements do not depend on notarization or mandate a second designation to maintain the initial designation's validity within the specified time frame. Thus, option A is the correct choice, affirming that the designation remains effective for three years unless formally revoked.