to.SampleLetterofacknowledgementforpaymentofoverduebalance.SampleLetter#4.Our recordsshowanoutstandingbalanceforyourson,Eric.Werequestthatyourmonthlytuition paymentbepaidbeforethe10thofeach.Thisletteristoremindyouofyouroutstanding balanceintheamountof$.___..paymentorifyouwouldliketomakeotherfinancial arrangements...