If you have been turned down for SSDI, you should file an appeal and continue to appeal denials at least through the hearing before an Administrative Law Judge. If you not file your appeal within 60 days, you may not be entitled to full SSD benefits. The Social Security Administration states that the most common mistake people make when trying to receive SSD benefits is failing to appeal or waiting too long to file their “Request for Reconsideration” and/or “Request for Hearing”.