After going through the sales process on the website, RecycleClub will send you a shipping label that you can use to ship the cartridges. You choose which carrier you use: DPD or DHL. Until the end of the year you can send the cartridges to us FREE OF CHARGE. If the shipping label has not been sent, it is best to contact us at info@recycleclub.com, we will send you the label again. Make sure you pack the cartridges neatly. For example in an egg carton or in a sturdy box with some newspapers. Click here to see where you can send your package.