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If nothing else, the not-so-amicable divorce negotiations between oil tycoon Harold Hamm and ex-wife Sue Ann Arnall have produced one of the most remarkable checks you'll ever see. On Jan. 5, the CEO of Continental Resources wrote one out to Arnall for $974,790,317.77, reports CNNMoney. Arnall, however, won't cash it because she says her ex amassed his much bigger fortune over the course of their 26-year marriage, and thus she is entitled to more. She has appealed the settlement, and now Hamm has filed an appeal of his own—he says plummeting oil prices have taken a toll on his net worth, reports Reuters. (Read more divorce stories.)