CBP may request laboratory fiber analysis reports, supplier certificates of origin, or breed documentation to verify that a shipment qualifies as cashmere (from cashmere goats) or mohair (from Angora goats) rather than a coarser fiber. Third-party fiber diameter testing (measured in microns) is the most reliable supporting document and is widely used in the luxury textile trade.

Live goats require USDA APHIS import permits, health certificates from the country of origin, and may be subject to quarantine upon arrival, with admissibility tied to disease-status determinations for the exporting country. Goat fiber (cashmere, mohair, raw hair) does not require APHIS clearance but must be correctly classified by CBP based on species and processing stage. Consult a licensed customs broker or USDA APHIS before importing live animals.