union goods are not customs goods. myartshipping can only transport union goods.
Union goods are (Art. 5 Nr. 23 UZK):
1. goods which are completely obtained or made in the customs territory of the Union, provided that they are originating goods of the Union (Art. 60 UZK)
2. goods obtained or made outside the customs territory of the Union - originate in a third country - which have been duly released for free circulation in the Union.
3. goods obtained or made exclusively from the abovementioned goods of the Union.
Link to German customs: