20 CFR 416.931: The meaning of presumptive disability or presumptive blindness.

If you are applying for supplemental security income benefits on the basis of disability or blindness, we may pay you benefits before we make a formal finding of whether or not you are disabled or blind. In order to receive these payments, we must find that you are presumptively disabled or presumptively blind. You must also meet all other eligibility requirements for supplemental security income benefits. We may make these payments to you for a period not longer than 6 months. These payments will not be considered overpayments if we later find that you are not disabled or blind.