R$ 120,000 in cryptocurrency. The password died with him. The lawyer said there was nothing to do.

It happens every week. Somewhere in Brazil, a family discovers, after the father (or son, or brother) has passed away, that he had a cryptocurrency wallet. Sometimes the family knew it existed. Sometimes they had no idea. The amounts vary: it could be R$ 3,000 or R$ 500,000.

The problem is always the same. The password was never found. The seed phrase (the 12 or 24-word phrase that recovers the wallet) was never written down anywhere, or was written on a piece of paper that no one found during the estate inventory. The exchange (Binance, Mercado Bitcoin, Foxbit, Bitso) has a strict policy on post-mortem access. The family lawyer consulted said there was no clear precedent to act on. The probate process moved forward without including the asset.

Money that technically exists. Accessible from anywhere in the world. Practically lost forever.

The case we are going to tell (composite, but based on real events)

Antônio, 52 years old, an accountant in São Paulo. Married for 23 years, two teenage children. He started buying Bitcoin in 2017 when the price was around R$ 30,000. He bought gradually over 5 years. He diversified into Ethereum and a few altcoins. In January 2025, with the market rally, his holdings totaled around R$ 120,000 spread between a Brazilian exchange and a Ledger hardware wallet he kept at home.

Antônio wrote down the Ledger seed phrase in a specific notebook in 2017 and never touched it again. He also wrote down his exchange username, but the password existed only in his head and possibly in the browser's password manager (which had biometric protection on his laptop).

Antônio passed away from a stroke in February 2025. The family was in shock for months, dealing with grief, the funeral, and the probate of real estate, bank accounts, and the car. His wife, Mariana, did not fully understand the crypto situation.

In May, the older son remembered his father talked about Bitcoin. He searched the laptop. He found the Binance icon in the browsing history. He tried to recover the password. Binance requested two-step authentication using Antônio's phone. The phone had been deactivated by the carrier because no one had paid the bill.

Mariana's family lawyer was brought in. The response was polite and direct: there is no clear procedure for heirs to access crypto without the credentials. The exchange has its own terms. The Brazilian Civil Code does not cover digital assets. Jurisprudence on the subject is still in its early stages. Pursuing it legally would be expensive, take years, and the outcome would be uncertain.

The Ledger wallet was found in the desk drawer. The notebook with the seed phrase was not. Antônio had a habit of keeping things organized, but at some point between 2017 and 2025 that notebook disappeared. Mariana searched every cabinet for months. It never turned up.

In October 2025, the family finalized the estate and the crypto assets were described in the proceedings as "potentially existing, access unrecoverable." R$ 120,000 that technically exists on the Bitcoin and Ethereum blockchains is still there, untouched, undecipherable without the seed phrase.

Why crypto is especially complicated

To understand why this case is so extreme, it helps to separate three layers of complication.

Layer 1: Self-custody vs exchange custody

When you store crypto in a hardware wallet (Ledger, Trezor) or self-custodied software wallet (MetaMask, Trust Wallet), no one else has access. There is no "support line" to call. There is no intermediary bank. The seed phrase is literally the only way to recover access.

When you store on an exchange (Binance, Mercado Bitcoin, Coinbase), the company holds it. In theory, with a court order, it is possible to engage the exchange. In practice, exchanges vary widely:

• Some have a formal inheritance process (with strict requirements, taking 6 to 18 months)
• Others argue that their terms of use prevent transfer without credentials
• Some older Brazilian exchanges went bankrupt (Bitcoin Banco in 2019, FoxBit had problems) and users lost everything

Antônio had both situations. Self-custody on the Ledger (no chance without the seed) and exchange custody (possible, but through a slow and uncertain process).

Layer 2: Brazilian legal framework still in early stages

As of 2026, Brazil does not have a specific federal law on digital inheritance. Various bills have been introduced over the years (including PL 4.099/2012, by congressman Marçal Filho, and later variants), but none became consolidated federal legislation on the subject. The Civil Code (Law 10.406/2002) governs the succession of physical property and credit rights, but makes no explicit mention of digital assets.

The LGPD (Law 13.709/2018) creates additional tension: personal data is not automatically transferable. When someone dies, the family needs access to data (email, photos, digital contracts), but the company storing it has data protection obligations that, in strict interpretation, do not end with the holder's death.

Brazilian jurisprudence on the subject is being built case by case. There are isolated rulings (some courts recognizing the family's right of access to social media accounts, others denying it), but there is no consolidated understanding. Each court decides based on its own interpretation of the Civil Code, LGPD, and the platform's terms of service.

Layer 3: The very nature of the blockchain

Bitcoin, Ethereum, and most blockchains were designed to be pseudonymous and censorship-resistant. This means that no one (not the government, not a judge, not Antônio's heirs) can "unlock" a wallet without the private key. Ownership on the blockchain literally means whoever holds the key.

In other words: Antônio owns the R$ 120,000 while alive because he holds the key. When he passed without transferring the key, in the strictest technical sense, the blockchain lost any concept of ownership for that wallet. The tokens exist; no one can touch them.

The question nobody wants to ask

The right question here is not "what does Antônio's family do now." That is a scenario with no easy technical solution. The right question is: if you were Antônio, what should you have done before passing to avoid leaving this problem for your family?

There are reasonable answers:

1. Seed phrase in a safe physical location, known to the family

A nice notebook, a safe, a locked drawer. The specific location matters less (the seed itself is in plain text, not encrypted). What matters: your family knows it exists and where it is. Some people use steel engraving plates (Cryptosteel, Coldti) to protect the seed against fire and water.

2. A document explaining what each term means

Your 50-year-old wife probably does not know what a "seed phrase" is. Writing down "12 random words in a blue notebook" without explanation is almost the same as writing nothing. Include: what it is, where it is, how to use it (download Ledger Live, connect the device, enter the seed if necessary).

3. Consider a multi-sig wallet for larger amounts

Multi-signature wallets require M of N keys to move funds (e.g., 2 of 3). You could set it up as: 1 key with you, 1 with your spouse, 1 with a trusted person. Even if you lose one, it is still recoverable. Greater technical complexity, but for six-figure assets it is worth considering.

4. Write down exchanges, usernames, and 2FA settings

Do not share the password (security still applies), but write down:

• Which exchanges you use
• Login (email)
• How to recover 2FA (printed backup codes)
• How to contact support

This alone gives the family a procedural path to claim access, even without direct credentials.

5. A digital wishes document

It does not replace a legal will, but it gives clarity. "In the event of my death, assets on the Ledger stored at [location] were worth approximately R$ X on [date]. To recover: [instructions]. To be decided jointly with Mariana regarding what to do with them." Read below what this is and how to create one.

What you can do today, without being an expert

You cannot undo Antônio's situation. But you can prevent it from happening to you. There is a 30-minute step-by-step guide that covers this and more.

TAIVA Vault has native digital inheritance: you designate trusted contacts who receive access to your vault after N days without a check-in from you (configurable). Everything is encrypted client-side. The contact receives clear instructions on how to access it when the time comes. It covers not just passwords, but notes, scanned documents (ID, driver's license, contracts), an asset inventory with photos, and crypto seed phrases if you want to record them.

The general rule for crypto, in one sentence: if your crypto holdings exceed R$ 5,000 and your family does not know how to recover them if something happens to you, you are leaving real money to no one.

Next in the series: He had 14 digital accounts. He passed away from a heart attack at 47. His wife accessed two of them.. The case is more common than it seems and covers almost everything beyond crypto.

Practical tutorial: How to leave your digital life organized for whoever will inherit it (in 30 minutes).

TAIVA Vault: personal digital vault with native digital inheritance, post-quantum encryption, servers in Brazil and Europe. Create free account →

This article is informational and does not constitute legal advice. For specific situations involving estate or succession with digital assets, consult a family and succession attorney.