You must ensure that your account information (that is, the information you provided when you registered for or subscribed to a Service) remains current, complete, accurate and truthful.

“Section 3 *You also agree to: (a) provide true, accurate, current and complete information about yourself as prompted by the Yahoo! Service's registration form (the "Registration Data") and (b) maintain and promptly update the Registration Data to keep it true, accurate, current and complete. If you provide any information that is untrue, inaccurate, not current or incomplete, or Yahoo! has reasonable grounds to suspect that such information is untrue, inaccurate, not current or incomplete, Yahoo! has the right to suspend or terminate your account and refuse any and all current or future use of the Yahoo! Services.*”