The ISO22000 standard requires withdrawal of unsafe products. The organization establishes a traceability system from raw material suppliers to direct distributors to ensure that unsafe products after delivery can be withdrawn in a timely and complete manner by using the traceability system, so as to reduce and eliminate the risk of unsafe products to consumers as much as possible. harm.

Clause 7.9.2 states that the organization shall establish a traceability system to ensure the identification of product batches and their relationship to raw material batches, processing and distribution records. The traceability system shall be able to identify the distribution of incoming materials and final products from the direct supplier to the direct distributor.

Clause 7.9.5 states that to ensure that affected batches of final product that have been determined to be unsafe can be recalled in a timely and complete manner after delivery, the organization shall establish and maintain documented procedures for notifying relevant parties (such as authorities) ,consumer). The cause, scope and results of product recalls should be reported to top management as input to management review. The organization shall verify the effectiveness of the recall program by using methods such as validation trials, simulated recalls or actual recalls. The level of detail of the traceability system should take into account possible recalls and legal and regulatory requirements. The standard requires that the top management should designate the person who has the right to initiate the withdrawal and the right to implement the withdrawal. Although this clause is a remedial measure for food safety control, it fully reflects the management concept of modern food safety.

"Validation" is the acquisition of evidence to demonstrate that the control measures arranged by the HACCP plan and the operational prerequisite programs are effective. The standard expresses and implicitly confirms requirements or concepts in many places, such as the suitability of system documents to be reviewed; the prerequisite program (PRP) to be reviewed and approved by the food safety team; the operational prerequisite program (OPRP) and HACCP plan to be reviewed and approved. Selection and evaluation (7.4.4); clear control measures and control measures combination to be confirmed (8.2); monitoring equipment and methods must be suitable (8.3), etc., the above content reflects the confirmation requirements.

Verification is the determination that specified requirements have been met by providing objective evidence. The purpose is to demonstrate the effectiveness of systems and controls. The standard requires that prerequisite programs, operational prerequisite programs, HACCP plans and combinations of control measures, potentially unsafe product disposal, emergency preparedness and response, withdrawal, etc. shall be verified, and shall be verified in the verification planning (7.8) and the verification of the food safety management system ( 8.4) specifies the way and method of verification. In addition, the validity of "withdrawal" is required to be verified by simulated withdrawal and actual withdrawal methods.