La. R.S. 11:192

Whenever any state, parochial, or municipal retirement system or pension fund pays any sum of money or benefits to a retiree, beneficiary, or survivor which is not due them, the board of trustees shall adjust the amount payable to the correct amount, and the board is hereby authorized to recover any overpayment by reducing the corrected benefit such that the overpayment will be repaid within a reasonable number of months. The board shall notify the beneficiary, or survivor, of the amount of overpayment in benefits and the amount of the adjustment in benefits, thirty days prior to any reduction from the benefit amount without the overpayment.