Canadian shipments and shipments destined for the U.S. do not need an attached customs form. Shipments to any other country however, must be accompanied by a CN-22 customs form. When purchasing international postage from Chit Chats, the CN-22 will be automatically generated and included within the shipping label.
If you ship internationally, some countries may require you to provide additional tax documentation. It is your responsibility to research the requirements of the destination country before you ship.