Suppliers must provide Phytosanitary Certificates issued by the exporting country's national plant protection organization. For entry into major markets, ensure compliance with ISO 22000 or HACCP food safety management systems. It is critical to request lab reports for pesticide residues, heavy metals (Lead/Arsenic), and microbiological contaminants like Salmonella and E. coli. For the US market, FDA registration is mandatory, while the EU requires adherence to EC No 396/2005 for maximum residue levels.