In the MtGOX claim, they ask you for your MTGOX account number.
How are you supposed to know that number ?!
How are you supposed to know that number ?!
as ppl pointed out on reddit (http://www.reddit.com/r/mtgoxinsolvency/comments/33vgty/question_what_is_mtgox_account_number_and_what_is/), just check your bank statements. it's in the description field when (if) you made a transfer there.