One Lambda, Inc. part of ThermoFisher Scientific, is voluntarily recalling Micro SSP DNA Typing Trays. Null allele information on the lot specific documents for these products is incorrect and may cause a mis-assignment. The root cause investigations determined that null allele entries during nomenclature update were not verified per the standard operating procedure. No adverse events or product complaints have been received. Consignees are asked to review test results generated with the above mentioned products, impacted test results may need to be further investigated by HLA Laboratory Director. No action required on product lots, products are acceptable for use with revised lot specific user documents. Consignees who have additional questions or concerns may contact One Lambda’s Customer Support team for assistance.