Inheritance Planning Methods

There are several approaches to ensuring your Bitcoin can be passed to your heirs. Each method involves trade-offs between security (protecting your keys while you're alive) and accessibility (ensuring your heirs can access them after you're gone).

Method 1: Trusted Person with Sealed Instructions

The simplest approach is to give a trusted family member or friend sealed instructions on how to access your Bitcoin. This might include your seed phrase, the location of your hardware wallet, and step-by-step recovery instructions.

• Pros: Simple, no technical setup, works immediately.
• Cons: Requires absolute trust. The person could access your funds at any time. A single point of failure.

Method 2: Split Seed Phrase (Shamir's Secret Sharing)

Shamir's Secret Sharing is a cryptographic technique that splits a secret (like your seed phrase) into multiple parts, requiring a minimum number of parts to reconstruct it. For example, you might split your seed into 5 shares and require any 3 to recover it.

• Pros: No single person has full access. Survives the loss of some shares.
• Cons: More complex to set up. Shares must be stored securely in different locations. Heirs need to understand the reconstruction process.
• Tools: Trezor's SLIP-39 standard supports Shamir backup natively.

Method 3: Lawyer or Notary with Sealed Envelope

You can leave your seed phrase or access instructions with a lawyer in a sealed envelope, to be opened upon presentation of a death certificate. This is a popular method that leverages existing legal infrastructure.

• Pros: Leverages trusted legal professionals. Death certificate requirement adds a layer of protection.
• Cons: You must trust the lawyer not to open the envelope. The lawyer may not understand crypto. Legal processes can be slow.

Method 4: Custodial Inheritance Services

Some companies now offer crypto-specific inheritance services. These custodians hold your keys and release them to designated beneficiaries following a verification process. Companies like Casa and Unchained offer inheritance-focused products.

• Pros: Professional management. Designed specifically for crypto inheritance.
• Cons: Introduces a custodian (counterparty risk). The company could go bankrupt. May not be available in all jurisdictions including Sri Lanka.

Choosing the Right Method

The best method depends on your situation. For smaller amounts, a trusted person with sealed instructions may suffice. For larger holdings, a combination of methods — such as Shamir's Secret Sharing with instructions left with a lawyer — provides stronger security. The key principle is redundancy without single points of failure. No single person, document, or company should be able to both access your funds and prevent your heirs from doing so.