An accusatory pleading shall be deemed to have been filed when it has been received by the magistrate or court.
When transmitted in electronic form, the accusatory pleading shall be exempt from any requirement that it be subscribed by a natural person. It is sufficient to satisfy any requirement that an accusatory pleading, or any part of it, be sworn to before an officer entitled to administer oaths, if the pleading, or any part of it, was in fact sworn to and the electronic form indicates which parts of the pleading were sworn to and the name of the officer who administered the oath.
Ca. Pen. Code § 959.1