town or village in this state, or from any officer as such of any such city, town or village in this state, arising out of or founded upon any ordinance, trust relation or contract written or unwritten, or any appropriation of or conversion of any real or personal property, shall be commenced except within three years next after the date of the act of omission or commission giving rise to the cause of action, suit or proceeding. ... All such suits, proceedings or actions not so commenced shall be forever barred----
Grace asserts several arguments in support of its position that the statute of limitations does not bar its claim for recovery of over-payments. We examine each of these arguments.
A. Mistake
{5} ? Grace contends that its claim is not barred because the statute of limitations did not begin to run until 1990 when Grace discovered the error in payment. Therefore, Grace explains, because this suit was filed in 1992, Grace’s claim for repayment is not time barred. Grace refers our attention to NMSA 1978, § 37-1-7 (1880), which states:
In actions for relief, on the ground of fraud or mistake, and in actions for injuries to, or conversion of property, the cause of action shall not be deemed to have accrued until the fraud, mistake, injury or conversion complained of, shall have been discovered by the party aggrieved.
{6} In Roscoe v. U.S. Life Title Insurance Co., 105 N.M. 589, 591, 734 P.2d 1272, 1274 (1987), the Supreme Court stated that Section 37-1-7 did not toll the statute of limitations due to one party’s mistake. In Roscoe, eight years after the appellants entered into a real estate purchase agreement, they discovered that a balloon payment in their mortgage contract was due. See id. at 590, 734 P.2d at 1273. The appellants filed a complaint after the statute of limitations had already run. See id. The appellants argued that Section 37-1-7 tolled the statute of limitations; however, the Supreme Court disagreed with the appellants’ position. The Court stated that it was the appellants’ responsibility to familiarize themselves with the terms of the agreement that they entered into and their failure to do so exhibited a lack of reasonable diligence. See id. at 591, 734 P.2d at 1274.
{7} Likewise, in this case, it was Grace’s responsibility to ensure that it correctly remitted payments to the City. For sixteen years Grace failed to discover its error. Furthermore, as conceded during oral argument by Grace’s counsel, the error was discoverable. If Grace had examined its accounting records during the sixteen-year period, Grace' could have discovered the miscalculation. See Ambassador E. Apts., Investors v. Ambassador E. Invs., 106 N.M. 534, 536, 746 P.2d 163, 165 (Ct.App.1987) (statute of limitations begins to run on date that party had actual knowledge of fraud or on the date when the party, through the exercise of reasonable diligence, should have discovered the fraud); Bassett v. Bassett, 110 N.M. 559, 563, 798 P.2d *160,* 164 (1990) (stating that party could not have possibly discovered the fraud until after the statute of limitations had run).
{8} In this case, Grace asserts no reason for its failure to discover the accounting error other than that its practice is not to check on past payments. Thus, because the party claiming that the statute of limitations should be tolled has the burden of setting forth sufficient facts to support its position, see Roscoe, 105 N.M. at 590, 734 P.2d at 1273, and because Grace has not alleged sufficient facts to excuse its lack of diligence, we hold that Section 37-1-7 did not toll the statute of limitations in this case.
{9} Additionally, Grace appears to argue that Section 37-1-24 does not apply because there was no act of commission or omission by the City to trigger the running of the statute. We disagree with Grace’s characterization. The act of commission by the City is accepting overpayment of royalties. Furthermore, the act of commission mentioned in the statute could also apply to Grace’s actions.