Packaging the shipments is a very important part before commencing the delivery, for which is the sender responsible. The senders are very careful in Germany, but even so we do recommend to inform them about the importance of the package and about the requirements of the carriers. It is the best way to prevent any damages.
Send a request for packaging in a message (e.g., on eBay). It is very important for the shipment to be well packed with an undamaged package before each delivery so that it will take in consideration the character of the shipment, which means:
The boxes, which are not completely filled are going to fall down under the weight of other boxes. The box should be able to bear four to five times more of its own weight. The empty spaces inside the box are decreasing the weight which leads to crushing it. Before closing the package it is very important to make sure that all of the spaces inside the box are filled with padding material just as e.g., foam peanuts or corrugated paperboard.