Ask the Lawyer received the following question (paraphrased for easier reading and clarity) from a reader on a legal matter that might be of interest to the entire audience. Q: A few years ago OPM erroneously disbursed a refund to me for retirement contributions in the 1980s when I transferred from CSRS to FERS. After an audit, I set up a payment plan via withholding from my FERS retirement annuity. From the forms I received, it appears almost 75 percent of the payback funds are repaying interest from the “taxable amount” portion of my annuity. I believe that the interest…