We are unwilling to hold that an abuse of discretion occurs when thedefaulting defendant fails to call his motion to the judge's attention and allows it to be overruled by operation of law. Trial judges have a heavy load of trials and contested motions. They cannot be expected to examine sua sponte all papers filed in their courts. They must rely on counsel to see that motions are set for hearing. 703 S.W.2d at 357-58. We resolve the fourth issue against National.
(a) In a suit to collect a delinquent tax, the taxing unit's current tax roll and delinquent tax roll or certified copies of the entries showing the property and the amount of the tax and penalties imposed and interest accrued constitute prima facie evidence that each person charged with a duty relating to the imposition of the tax has complied with all requirements of law and that the amount of tax alleged to be delinquent against the property and the amount of penalties and interest due on that tax as listed are the correct amounts.Tex. Tax Code Ann. 33.47(a) (Vernon 2001). Once the taxing unit introduces the records described above, it establishes a prima facie case as to every material fact necessary to establish its cause of action. See Davis v. City of Austin, 632 S.W.2d 331, 333 (Tex. 1982). A rebuttable presumption arises that the taxes in question are due, delinquent and unpaid. Flowers v. Lavaca County Appraisal Dist., 766 S.W.2d 825, 828 (Tex. App.-Corpus Christi 1989, writ denied). This presumption, based on the tax roll showing against whom the taxes were assessed for the year in question, also establishes that the defendant owned the property on January 1 of the year for which the tax was imposed. See GE Capital Corp. v. City of Corpus Christi, 850 S.W.2d 596, 600 (Tex. App.-Corpus Christi 1993, writ denied).