In Caspary v. Corpus Christi Downtown Mgmt. Dist., 942 S.W.2d 223, 226 (Tex. App.--Corpus Christi 1997, writ denied), property owners objected to a proposed assessment scheme at a district's hearing, but did not receive notice that their objections had been overruled. Id. Some time later, outside of the "opportunistic window for seeking an administrative appeal," the property owners received their tax bill, and they brought suit in a district court to challenge the validity of the assessment. Id at 224. The court of appeals held that because the property owners had failed to exhaust their remedies, the trial court did not err in granting the district's plea to the jurisdiction. Id. at 227.