wallet.dat files after a death

A wallet.dat file is the wallet file used by Bitcoin Core and other Bitcoin-family clients: Litecoin, Dogecoin, Dash and similar software wallets all use the same file. If you found one on a computer, drive or backup after a death, you found something genuinely important; and genuinely easy to destroy by accident.

What wallet.dat actually is

• It contains the keys needed to spend the bitcoins it controls. According to the official Bitcoin Core documentation, it is not encrypted by default, which makes it highly sensitive, the file itself is the asset.
• It can be password-protected in newer versions, but even then the file is the access path.
• It is not a “statement” or a proof of balance. A visible balance in wallet software proves nothing about who may act, see why a wallet balance proves nothing.

The empty-wallet trap

Opening the wrong copy, opening the software fresh, or letting it “repair” can create a new, empty wallet.dat that looks like the real one, while the original sits elsewhere, on another drive or an old backup. The official documentation even warns that wallets must be backed up with the wallet’s own tools to get a safe copy. For an estate, the rule is simpler: do not open anything, and do not let anyone else “check” the file.

How to preserve it

• Leave the file and its device exactly as found. Do not move, rename, decrypt, copy carelessly or open it in any software.
• Do not update the Bitcoin Core installation, do not let it sync, and do not click “repair” or “rescan” prompts.
• Do not send the file to anyone, and do not upload it to a service that offers to “check” it, you open it yourself, in the official program, after authority is confirmed.
• Record only that you found it, where, and when, see chain of custody.

What to do with it

• Access is the file plus its password. The wallet file is used by Bitcoin Core and similar Bitcoin-family programs (Litecoin, Dogecoin, Dash and more).
• When the estate is ready (authority confirmed, password found): the file is opened with the matching program, the same program family that created it. The password unlocks it.
• The classic mistake: opening the file in fresh software can create a NEW, empty wallet file that looks like the real one, while the original sits elsewhere. An empty screen proves nothing.
• If the file is unencrypted (the default in Bitcoin Core), no password is needed, the file itself is the secret, so it must stay protected. If it is encrypted and the password is missing: read what is realistically possible in wallet recovery.
• Until authority is confirmed, do not open the file, do not let the software sync, and record only that it exists.

What happens next

1. Confirm what else exists: passwords, passphrases, other backups, notes. See wallet passwords and passphrases.
2. Confirm legal authority before anyone touches the wallet, see legal authority vs technical access.

This page covers one format. For the general identification flow, start at what did you find.

For the full index of every wallet format and its deep guide, see the wallet format library.