Annual Custody Review
A full-day review of your offline wallet setup, seed phrase storage, backup copies, and inheritance documentation. Includes a written custody log entry.
Learn MoreSeoul · Offline Wallet Custody
Your seed phrase deserves a written record and a regular checkup
File Haven Core maintains custody logs for cold-storage wallets and schedules structured checkups so holders in Korea can verify backups, inheritance plans, and recovery steps without connecting devices online.
Custody Reviews
Structured checkups for offline holdings
Seed Phrase Audit Session
Verify that your recovery words match your intended wallet, confirm checksum validity, and update your custody log with any changes since your last visit.
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Recovery Checkup Planning
Map out what happens if you lose access, relocate, or need a trusted person to recover funds. We document steps without ever storing your seed phrase.
Learn MoreWhy a custody log
Memory fades. Paper and process do not.
Most wallet losses happen years after the initial setup — when backup locations change, metal plates corrode, or family members forget which drawer holds the recovery sheet. A custody log records where backups live, when they were last verified, and what still needs attention.
Our reviews take place entirely offline. We never ask you to type a seed phrase into a computer, photograph it, or connect a hardware wallet to the internet during a session.
Our ApproachAvailable on the Microsoft Store
Get it from MicrosoftFrom the Journal
When Metal Seed Backups Start to Fail
Stainless plates stored near coastal humidity showed pitting after four years. We document what to inspect during your next checkup.
Client Voices
What holders say after their first review
They found that my second backup copy was stored in a folder with a different BIP39 word count than my primary sheet. I would never have noticed on my own.— Min-jun K., annual review client, Mapo-gu
The session ran longer than expected because we had to locate a passphrase hint my spouse wrote down in 2021. Thorough, though the office parking was tight on a weekday.— Hye-jin L., recovery planning client, Seongnam