Yes, HACCP is often considered a prerequisite for ISO 22000. ISO 22000 incorporates HACCP principles as part of its framework to ensure effective food safety management systems. For instance, HACCP plan will be audited, as it demonstrates your commitment to hazard control and lays a solid foundation for ISO 22000 compliance.
While HACCP implementation is indeed a recommended prerequisite for ISO 22000 certification, possessing a separate HACCP certification is not mandatory. ISO 22000 incorporates HACCP principles into its framework, and having prior HACCP knowledge greatly facilitates the ISO 22000 certification process.