Customs Documents must be securely attached to the outside of the box. This way Customs Officers can check what items are being shipped inside of your shipment. You should add 5 copies of the Customs Documents into a clear plastic envelope or wallet and ensure that this is fastened securely to the outside of the box.
If you do not have a clear plastic wallet or envelope, use an envelope clearly marked 'Customs Documents'. For more in-depth information on attaching Customs Documents, you can learn more here.
Parcel Monkey collects all of the relevant information required for the Customs Documents in the booking process, so all you then need to do is print out the documents and shipping label and attach them both to the box.