a substantial change in circumstances that would entitle him to a modification of his support obligation. A party is entitled to such a modification if he can show an unanticipated substantial change in circumstances. Butler v. Butler, 385 S.C. 328, 336, 684 S.E.2d 191, 195 (Ct.App.2009). “The party seeking modification bears the burden to show by a preponderance of the evidence that the unforeseen change has occurred.” Id. (quotations omitted). This burden is always a high one, hence the requirement that the change in circumstances be “substantial.” Prior case law has indicated that a party faces a heightened burden when seeking to prove a substantial change in circumstances from a court order approving an agreement. See Floyd v. Morgan, 383 S.C. 469, 475, 681 S.E.2d 570, 573 (2009) (<HOLDING>); Upchurch v. Upchurch, 367 S.C. 16, 26, 624
holding that the trial court abused its discretion in failing to award the increased child support retroactive to the date of the petition for modification because the childs increased need for support and the former husbands ability to pay the increased child support existed at the time the former wifes petition for modification was filed holding that a showing of a change in circumstances that is or is likely to be beneficial to the child may also warrant a change in custody holding that attorneys fees and costs may not be awarded as child support when they are incurred in a suit to modify the parentchild relationship that does not involve the enforcement of a child support obligation holding there is an increased burden to modify a child support obligation based on substantial change in circumstances where an agreement is involved holding that there may be an obligation to defend under an insurance policy even though there is no obligation to indemnify