Return of newborn metabolic screening samples ('Guthrie card' or 'blood spot card') to family request form Use this form to request the return of a residual newborn metabolic screening sample. View resource: Return of newborn metabolic screening samples ('Guthrie card' or 'blood spot card') to family request form (doc, 97 KB) Return of newborn metabolic screening samples ('Guthrie card' or 'blood spot card') to family request form (pdf, 149 KB)