U.S. Customs and Border Protection (CBP) can and occasionally does seize peptide shipments, particularly larger quantities. The FDA's personal importation policy allows some discretion for small quantities of unapproved drugs for personal use, but this is a policy—not a right. Seizure risk varies by volume, country of origin, and current enforcement priorities. If a package is seized, you'll typically receive a notice letter. You will not face criminal charges for a personal-use quantity, but you will lose the product. See the shipping section for tips on minimizing risk.