My current husband divorced in 2001 after 20 years of marriage. He continued to work for the government for an additional 12 years before retiring. At the time of his divorce the division of his retirement stated that his ex was entitled to half the current value of his csrs funds with no additional interest. After retiring he found she had filed a QDRO six months after their divorce allowing her survival benefits and she is receiving half of his retirement pension . How can we have the calculations corrected and the survivor benefits removed since this was not agreed to by him in the final decree? (he never knew of the QDRO until he requested OPM to show the calculations of his retirement)