The requirement to obtain a customs bond as part of the Importer Security Filing (ISF) process depends on the specific circumstances of your importing activities and the requirements of U.S. Customs and Border Protection (CBP).

In general, a customs bond is a financial guarantee that is required to ensure that duties, taxes, and other fees owed to CBP will be paid. Customs bonds are typically required for importers who are importing goods on a regular basis or who are importing goods that are subject to certain regulatory requirements.

If you are required to file an ISF, it is possible that you may also be required to obtain a customs bond, depending on your importing activities.