An overpayment is caused when TWC pays unemployment benefits that you were not eligible to receive. Log on to Unemployment Benefits Services (UBS).State agencies can require a worker to repay UI benefits if they find that those benefits, or part of those benefits, were improperly paid. If you cannot repay the entire amount, you may be able to set up a payment plan with us. The Mass Claims program streamlines the unemployment benefit claims process for employers faced with either temporary or permanent layoffs.