A spouse, surviving spouse, or parent should file an SSA-760-F4 (Certificate of Support) within the specified time limit whether or not a claim is
            filed.
         
         An SSA-3 (Marriage Certification) must accompany the spouse's SSA-760-F4.
         If the support determination is favorable, evidence supporting all allegations is
            required.
         
         
            
            
               
               For child's benefits, this form may only be used to determine whether the "other reasonable
                  period" rule or the "untoward circumstances" rule may apply when determining the period
                  of support for stepchildren (see RS 01301.020).