I know I'm a bit late but I just accessed an old email and realized I had some BTC left on MtGox. I guess it's too late to file a claim? Does anyone have the database leak so I can confirm how much I had left?
You can check this article
Mt. Gox Postpones Repayment Deadline to 2025 that has a link to an official guide from Mt.Gox.
Notice Concerning Change of Repayments Deadline . You can read the full document for more details about their Rehabilitation Claim Filing System.
2． InquiriesFor any inquiries, please log into the MTGOX Online Rehabilitation Claim Filing System (i.e., the system accessible via
https://claims.mtgox.com/; the “System”) and use the inquiry form accessible from the “FREQUENTLY ASKED QUESTIONS (FAQ)” button in the upper right corner of the screen.