The Signature clause in Global Wizard cannot be used on the USMCA template as the certifier may not be the person filling out the other documents.
If you need to change the name on the certifier to match a signature that will be added outside of the system (for those that might need to have the form signed), change the name & email address on the exporter, producer and manufacturer under entities.
This will flow over to the USMCA form.