What is the function of a customs declaration form?

The function of a customs declaration form is to declare the contents and value of international packages. This form is a critical component of international shipping, as it provides customs officials with essential information about what is being sent across borders. It details the items included in the package, their value, and their purpose, which is necessary for assessing potential duties, taxes, or import restrictions that may apply. This transparency helps in smooth customs processing and prevents issues that could delay the delivery of the package.

In the context of the other options, certifying the delivery of local mail pertains to domestic mail, which does not require a customs declaration. Similarly, completing shipping labels for express mail and identifying return addresses are more about the domestic shipping process and do not involve customs requirements for international packages. Therefore, option B accurately reflects the primary purpose of a customs declaration form.