When shipping internationally, first verify the shipping requirements as described by your choice of delivery service provider (FedEx, UPS, ParcelForce, DHL, etc.).
US Customs requires that all international shipments have two copies of a written declaration (see example below) specifying the content of the package. One copy of the declaration should be secured to the outside of the package, and the other should be inserted inside the package. To create the declaration, copy the following statements onto a piece of paper, preferably your clinic or your own letterhead, and make sure to sign and date the declaration.