Go to My Tradera. Click on Sold in the menu and then on the Book shipping button in blue on the right side. Then check the following four steps:

Control your information
Check the information to make sure the recipient’s address is correct.

Choose package type
Choose between the options offered by DHL

Confirm booking 
Click “Add to cart” in order to finalize the booking. Choose payment option and pay for the shipping, alternatively pick the option of paying at the pick-up agent’s. You will then see a confirmation of your shipping. You will also receive a confirmation email. Print the confirmation (you will need the barcode) and bring it to your DHL agent. If you don’t have access to a printer you can submit the sending number while delivering the parcel.