A Social Security disability overpayment occurs when the Social Security Administration (SSA) determines that you’ve received more Social Security Disability Insurance (SSDI) or Supplemental Security Income (SSI) benefits than you were entitled to receive. When the SSA discovers the overpayment, it sends a notice detailing the amount overpaid. You can contest an overpayment by asking for reconsideration or a waiver. Ignoring an overpayment notice could result in a reduction in long-term disability benefits and aggressive collection methods, such as tax refund interception and wage garnishment.