[Translation from Japanese to English ] I am thinking of bidding. What kind of document is needed for being authorize...

Original text

入札を検討しております。オークションの参加承認をして頂くために何か必要な書類は必要でしょうか？？
日本からの参加ですが、ベルリンでの商品受け取りも可能です。どうぞよろしくお願い申し上げます。

Translation / English

I am thinking of bidding. What kind of document is needed for being authorized for participation of auction?
I participate in it from Japan, but can receive an item in Berlin.
I appreciate your understanding.

Translation / English

I am planning bidding. Do I need any documents to approve my participation in the auction?
I will participate from Japan, but I can also receive items in Berlin. Thank you very much.

Translation / English

I am considering the bidding at the moment. In order to approve of the participation in the auction, what are the necessary documents?
I am participating from Japan but I will be able to receive items in Berlin.
With regards.