Horrible Customer service i ever seen and authentication service as well. You can contact with them only by chatting with assistance, not by email, not via phone. I sold my authentic Zimmermann dress there which one supposed to be go trough authentic service team, and they cancelled my sale and said my dress is not authentic with no proof and reason, i send them my proof of purchase, original invoice and payment ( i purchased this item 2.5 years ago), so if you don’t have original proof of purchase, you not gonna win. And even after this they told me NO, i don’t have no comments on this. I said ok, send me my item back. I was so exhausted about all this conversation. They asked me to pay $15 fee to get my item back, UNBELIEVABLE. I asked them provide me step by step where and how i can pay. 2 days after, agent contacted with me again and said my item will go to 2 nd authentic check, since i provided my invoice. 3 days after nobody’s contacted with me about my item. I contacted with them by myself and new agent told me again my item not authentic and sale was cancelled and asked me to provide invoice. I was shocked, i tell him i already did with previous agent. I don’t have no words, the most worst service ever.