Cosper v. Superior CourtAnnotate this Case
The Moras sued Pauline Cosper for damages arising from a car accident. After mandatory arbitration, the arbitrator entered an award in favor of the Moras. The next day, Cosper filed a notice of appeal seeking a trial de novo and a list of witnesses and exhibits. Approximately two months later, Cosper filed a supplemental witness list designating an expert and disclosing her report. The superior court struck the supplemental disclosures as untimely, noting that Cosper had not attempted to show good cause for the later disclosure under Ariz. R. Civ. P. 77. The court of appeals granted relief, holding that Rule 77 permits supplemental disclosure within eighty days after the filing of an appeal from compulsory arbitration without requiring that parties show good cause. The Supreme Court vacated the court of appeals and affirmed the superior court, holding that Rule 77(g)(1) requires that those appealing from arbitration awards simultaneously with the filing of the appeal file a list of witnesses and exhibits intended to be used at trial, and this list can only be supplemented for good cause under Rule 77(g)(4).