Not everyone gets to see a check for $975 million with their name on it. But after a highly contentious divorce, Sue Ann Arnall is looking for more. 
 
 She rejected the check her ex-husband Harold Hamm sent her Monday, according to his attorneys. 
 
 Hamm agreed to pay the nearly $1 billion back in November. He's somewhat of a legend in the oil business, having built Continental Resources (CLR) from the ground up and led the development of North Dakota's Bakken oil field. 
 
 But Arnall, an economist and a lawyer who held executive positions in the company, has said she is entitled to more. She filed for an appeal, claiming that the fortune was due to both her work and his. 
 
 Arnall's attorney did not immediately respond to a request for comment. 
 
 Related: Oil tycoon is too broke for $1 billion divorce 
 
 The couple was married for 26 years, have two children and had no prenuptial agreement. 
 
 To make things even messier, Hamm himself filed for an appeal as well. He claims that with the dramatic drop in oil prices, his company's value has taken a hit, along with his wealth. 
 
 Despite writing the check, Hamm will move forward with his appeal, his attorney Craig Box said. ||||| Sue Ann Hamm stands in the courthouse hall before divorce proceedings with Harold Hamm, founder and CEO of Continental Resources, in Oklahoma City, Oklahoma September 22, 2014. Picture taken September 22, 2014. 
 
 Harold Hamm, founder and CEO of Continental Resources, enters the courthouse for divorce proceedings with then wife Sue Ann Hamm in Oklahoma City, Oklahoma, in this September 22, 2014 file photo. 
 
 Harold Hamm, the chief executive of oil driller Continental Resources who is embroiled in a bitter divorce, offered to pay his former wife $974.8 million, but she rejected a hand-written check, lawyers for both sides said on Tuesday. 
 
 Hamm's offer would have paid his ex-wife, Sue Ann Arnall, immediately the full cash value of what he owes based on a November divorce ruling by an Oklahoma County judge. 
 
 The lawyers said Arnall did not want to accept the check for fear of hurting her appeal of that decision. 
 
 Michael Burrage, Hamm's lawyer, said in an email that Arnall could still cash the check if she wants to, and Hamm had borrowed funds to ensure there would be enough cash in his account to cover it. 
 
 Hamm's offer to pay his ex-wife should stop the interest of more than $93,000 per day that has accrued on the award since November, his lawyer said. 
 
 One of Arnall's lawyers, Ron Barber, said that she has no plan to cash the check since accepting Hamm's payment could hurt her appeal. Arnall and Hamm both appeared in Oklahoma court on Tuesday, in part seeking to clarify how much of the November award to Sue Ann should be made available to her pending appeals in the case. 
 
 Oklahoma County Judge Howard Haralson did not offer a dollar amount. Hamm's lawyers said that Arnall could file an application for temporary relief or borrow money to fund her appeal and living costs if necessary. 
 
 Both Arnall, who was formerly Sue Ann Hamm and resumed using her birth name after the divorce, and Hamm have appealed the November divorce judgment. Appeals are set to be heard by the Oklahoma Supreme Court, Reuters reported earlier. 
 
 "We are seeking clarification of the court's November 10 order at today's hearing and can not accept any payments, pending such clarification, without jeopardizing Ms Arnall's rights on appeal," Barber said in an email 
 
 Arnall, a former Continental executive who was married to Hamm for 26 years, contends that her award of around $1 billion in cash and assets was inadequate and allowed Hamm to keep the lion's share of a fortune her lawyers valued as high as $18 billion. 
 
 Hamm had already paid his former wife more than $20 million during the divorce proceedings. 
 
 Hamm's appeal contends that the $1 billion award was too steep. Hamm has lost billions tied to the value of his 68 percent stake in Continental in recent months, which his legal team blames on the sharp fall in oil prices. 
 
 ONE OF BIGGEST U.S. DIVORCES 
 
 The dueling appeals are the latest twist in one of the largest divorce cases in U.S. history. The contest pits America’s biggest owner of oil against an attorney ex-wife intent on showing that the Hamm fortune stemmed from hard work – both his and hers – during a 26-year marriage. 
 
 Hamm contends his Continental stake, which he owned before meeting Arnall, surged in value during the marriage due to “passive” or market factors, like rising oil prices. 
 
 Oklahoma law says only marital wealth stemming from active efforts or skills of either spouse should be split in a divorce. 
 
 The appeals risk dragging Hamm and his Oklahoma City-based oil company deeper into a divorce battle that is already in its third year. The fight has entailed tens of millions of dollars in costs and a 10-week trial that ended in October. 
 
 The case was conducted mostly behind closed doors, after the judge ruled that opening it would harm Continental. 
 
 November's judgment, while one of the biggest on record, allowed Hamm to retain his majority stake in Continental, the top driller in North Dakota’s oil boom. 
 
 But the value of his Continental shares has fallen by more than half, to around $8.2 billion, since the trial started in August. The company has said its CEO's divorce has not had an impact on its business or operations. 
 
 (Additional reporting by Brian Grow in Atlanta.; Editing by Cynthia Osterman)
– 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.