Rules on Civil Procedure
Section 1. Dismissal upon notice by plaintiff. - A complaint may be dismissed by the plaintiff by filing a notice of dismissal at any time before service of the answer or of a motion for summary judgment. Upon such notice being filed, the court shall issue an order confirming the dismissal. Unless otherwise stated in the notice, the dismissal is without prejudice, except that a notice operates as an adjudication upon the merits when filed by a plaintiff who has once dismissed in a competent court an action based on or including the same claim. (1a)