A protective filing date marks the time when a disability applicant made a written statement of his or her intent to file for Social Security Disability benefits. If an applicant initiates the filing process online and only gets part way through the application, this can help establish a protective filing date as well. A protective filing can help ensure a claimant receives all of the benefits he or she is entitled to. The application must be completed within 6 months of the protective filing date or SSA will delete the claim.