UC San Diego SearchMenu

How to Complete USPS Customs Forms

Learn how to complete U.S. Postal Service (USPS) customs forms.

International mail is subject to customs examination in the destination country. You must declare the contents and value on the applicable customs form unless:

  • You are sending Global Express Mail (to certain destination countries) weighing less than 16 ounces and containing documents
  • You are sending non-dutiable letter-post items weighing less than 16 ounces

Expand all

1. Complete online customs form.

2. Mail your international mail

  • Put your mail with your outgoing mail, or
  • Take your mail to Mail Services by 3:00 p.m.

Expand all