Any appeal or other pending review proceedings may be summarily dismissed by order of the court where there has been a joint motion filed by all interested parties or their attorneys which shall set forth the reason for the dismissal applied for and is supported by appropriate affidavits that the facts alleged in the motion are true and correct. In the absence of a timely answer to the appeal or other formal action by an opponent to amend or modify the judgment of which review is sought, the appellant, applicant, or relator alone may, by formal motion to dismiss, on leave of court, forthwith abandon his appeal or other proceeding and obtain its dismissal.
La. R. Sup. Ct. 4