A Customs bond is a contract between three parties (Customs, a principal (i.e. an importer), and a surety) to ensure that all the duties and fees associated with the rules and regulations of importing or other Customs activities are paid to Customs by the principal.
A Customs bond is a requirement to import into the US as per US Customs regulations, and as such an importer should obtain a bond through a reputable and reliable company.
Most bonds are issued through Customs brokers, who work with surety agencies on behalf of the importers. This is beneficial to the importer because a Customs broker has the expertise and relationships related to Customs activity, and can better assist in proactively monitoring the bond and also with resolution of any issues or claims that may arise.