If you are using a single transaction bond to fulfill your Importer Security Filing (ISF) obligation, you must include certain information on your ISF. Specifically, you must indicate that you are using activity type 01 (basic importation), bond type 9 (single transaction), the surety code, and the bond reference number. The bond reference number is a unique serial number that appears on CBP Form 301 and is used by the surety company to track the bond. It is important to note that this is not the same as the “Bond Number assigned by CBP,” which is found in the “CBP use only” section of the form.

If you are making a unified entry filing and you are using a single transaction bond, you should include the unique ISF transaction number in block 29 of CBP Form 3461 (customs entry). This will let CBP know that the single transaction bond covers both the ISF and the entry.