A customs bond is required by US Customs and Border Protection (CBP) for ISF Filing of commercial shipments. If you do not currently have a customs bond, you can purchase an ISF customs bond for your Importer Security Filing. The minimum allowed by CBP is $10,000. Please note, this bond will only cover your ISF filing and at the time of import entry filing, you will also require a single transaction customs bond. Purchase your ISF customs bond today to file your ISF in a timely manner and avoid US Customs late filing penalties.