What certifications should a CPG co-packer have?

It depends on your category. Supplements need cGMP and third-party testing; food and beverage need a documented HACCP plan and FDA registration; agricultural products may need EPA registration; cosmetics benefit from GMP and stability data. Always request a recent audit or test report before signing. Manufacturers listed in AJ Cosmo Labs are vetted, and you can ask for documentation directly in-app.