Customs Invoices are only required if you are sending your package outside of the European Union (EU). If you are sending your parcel outside of the EU, you are required by Law to complete 4 Customs Invoices and attach them to your parcel(s).To use this form, please enter the Customs Invoice details in the fields provided. When the form is complete, click the Generate Shipping Invoice button and a pre-formatted Customs Invoice page will appear ready to print your four required copies onto your own Company header paper.