From what I can make out on Google Translate, it looks like a letter that has been sent out to all creditors of "the company".
It is basically advising that by order of the Frankfurt court, "the company" has been made insolvent, and as such the insolvency agents are asking for all creditors to send a proof of the debt that they are owed by "the company". This proof is either a bill of sale, court order, or other such item.
I would guess that this has not only gone out to anybody who pre-ordered from them, but also to any suppliers that are also believed to be owed money as well.
Mike
