When NYCE selects a certified product, they call the certificate holder to make an appointment. An employee from NYCE goes to the warehouse of the certificate holder (importer of the product) and will select one new sample of the product.
The employee from NYCE will put some special tape around the product sample box and will ask the certificate holder to send the sample to the test lab where it was first tested to obtain the current certificate.
NYCE gives 30 days to the certificate holder, so they can present the new test report. If the new test report for the sample is not presented before the 30 days, the certificate gets cancelled. Once the safety NOM certificate is cancelled, NYCE notifies the customs authorities that the product certificate has been cancelled and the product cannot be imported to Mexico anymore, until they get a new certificate going through all the process of sending a sample for testing and applying for a new certificate again.