Estate & Inheritance Planning for Heirlooms

Will vs Trust vs Letter of Intent vs Heir Protocol

By Michael Tanguma, Founder & CEO of Heirfolio. Reviewed by Diana Cruz, GIA Graduate Gemologist. Updated May 25, 2026.

TL;DR. A will distributes your residual estate after probate. A revocable living trust holds assets that bypass probate while you're alive and transfers them automatically after death. A letter of intent (or personal property memorandum) tells your family which specific heirloom goes to which specific person. A Heir Protocol is the documented inventory and live valuation layer that makes the other three actionable. Most households need three of these. None of them is a substitute for the others.

A reader's father died in 2024 with a will that read, in the relevant paragraph: "All personal property to be divided equally among my three children." When the children opened the safe deposit box, they found their grandmother's emerald ring, their father's gold watch, two coin collections (one gold, one silver), and an envelope marked "for Sarah" in their father's handwriting. The will was clear. The envelope was not legally enforceable. The siblings have not spoken in eight months.

The failure mode to name first: most estate planning conversations treat "I have a will" as the end of the conversation. It is the beginning. A will distributes the residual estate by category, not by specific item. The specific item question — which ring goes to which person — lives in a different document.

This article maps the four documents most families end up needing, what each one does, where each one fails alone, and how they fit together.

Generate a free letter of intent in 5 minutes — covers your physical heirlooms

The four documents at a glance

Document	What it does	Legally binding?	Required?
Will	Names executor, distributes residual estate, designates guardian for minor children	Yes (when properly executed)	Strongly recommended; intestacy laws apply if absent
Revocable living trust	Holds assets that bypass probate; auto-transfers on death	Yes	Optional but valuable above ~$150K estate value
Letter of intent / personal property memorandum	Lists which specific items go to which specific people	Sometimes (depends on state and whether the will references it)	Strongly recommended; otherwise items default to will's general distribution
Heir Protocol	Live documented inventory with photos, valuations, beneficiary designations	No (it's documentation, not a legal instrument)	Recommended for physical heirlooms, gold, and Bitcoin

These four are not competing options. They cover four different layers of the inheritance handoff.

The full feature-by-feature comparison

Feature	Will	Living trust	Letter of intent	Heir Protocol
Legal force	Highest (testamentary instrument)	High (contract-based)	Variable (state-dependent; binding if will incorporates it by reference in some states)	None (documentation only)
Probate required	Yes	No (for assets held in trust)	Reads alongside will	N/A
Time to take effect	At death	Immediate (for assets transferred to trust)	At death	Live; updated continuously
Privacy	Public (probate records)	Private	Variable	Private (account-controlled)
Cost to create	$159–$599 (DIY) / $500–$3,000 (attorney)	$599–$3,000 (DIY) / $1,500–$5,000 (attorney)	$0 (DIY template, or generated free in Heir Protocol)	$0 (free tier) / $29–$99/mo (paid tiers)
Annual maintenance	$0 (recommended review every 3–5 years)	$0–$500/yr (depending on complexity)	$0 (update as you wish)	Subscription (if on paid tier)
Handles real estate	Yes (named in will; subject to probate)	Yes (titled to trust; bypasses probate)	No	Optional documentation
Handles financial accounts	Yes (residual; or by beneficiary designation)	Yes (titled to trust)	No	Optional documentation
Handles jewelry / heirlooms	Generic distribution only	Generic distribution only	Yes — per-item designation	Yes — per-item with photo, valuation, beneficiary
Handles gold / bullion	Generic distribution only	Yes (titled to trust)	Per-item designation	Yes — with live valuation
Handles Bitcoin	Generic; insufficient alone	Yes (titled to trust)	Possible but limited	Yes — with custody architecture context
Live valuation	No	No	No	Yes (gold, Bitcoin, jewelry)
Photos of items	No	No	Sometimes attached	Yes (standard)
Updatable	Requires formal amendment or new will	Requires trust amendment	Anytime, freely	Anytime, freely
Probate avoidance	No (the will IS the probate document)	Yes	No	N/A
Tax planning	Limited	Strong (with proper structure)	None	None (informational only)
Guardianship for minors	Yes (the only document that can do this)	No	No	No
Healthcare decisions	No (separate healthcare directive)	No (separate healthcare directive)	No	No
Power of attorney	No (separate POA document)	No (separate POA document)	No	No
Required for inheritance handoff to work	Yes (for most estates)	Optional	Recommended for physical items	Recommended for physical and Bitcoin items

What does a will actually do?

A will is the foundation legal instrument. It does five things only it can do.

Names your executor. The person legally empowered to administer your estate.
Distributes your residual estate. The assets that aren't in a trust, aren't joint-titled, and don't have a beneficiary designation flow through the will.
Designates a guardian for minor children. This is the most important and most-overlooked function of a will for parents.
Provides instructions to the probate court. The probate process exists to make sure the will is valid and the executor is acting properly.
Can incorporate a letter of intent or personal property memorandum by reference in some states, which is what makes those documents legally binding.

A will does NOT, alone:

Avoid probate.
Distribute specific items to specific people without explicit naming or incorporation by reference.
Handle Bitcoin self-custody, hardware wallets, or seed phrases (it can name them but it cannot make them accessible).
Track changing values of assets.
Document what you actually own.

Recommended for: Every adult with assets and/or minor children. The cost is small ($159–$599 DIY through Trust & Will or LegalZoom; $500–$3,000 with an attorney). The cost of dying without one (intestate succession in your state) is typically much higher.

What does a revocable living trust do?

A living trust is a legal entity that holds your assets. You are the grantor (you create it), the trustee (you manage it during your lifetime), and typically the beneficiary (you benefit from it during your lifetime). At your death, a successor trustee takes over and distributes assets according to the trust's terms — without going through probate.

The three things only a trust can do well:

Avoid probate. Assets titled to the trust transfer to beneficiaries automatically at the grantor's death without court involvement.
Maintain privacy. Probate is public; trusts are not.
Provide ongoing management for beneficiaries. A trust can hold assets for minor children, beneficiaries with special needs, or beneficiaries who shouldn't receive a lump sum, distributing over time according to terms you set.

A living trust does NOT, alone:

Replace the will entirely. You typically still need a "pour-over will" that catches any assets not titled to the trust.
Reduce federal estate tax (revocable trusts are includible in your estate for tax purposes).
Document the specific items you own.
Address Bitcoin self-custody, hardware wallets, or seed phrases at the operational layer.

Recommended for: Households above roughly $150K in estate value where probate avoidance is meaningful (probate fees vary widely by state; CA, NY, FL, MA can easily run 2–4% of estate value). Households with privacy concerns. Households with minor children or beneficiaries who need ongoing management. Anyone with real estate in multiple states (avoids multi-state probate).

Not strictly necessary for: Small estates that qualify for small-estate or summary administration in your state. Estates where probate is fast and inexpensive (some states are notably less burdensome than others).

What does a letter of intent (or personal property memorandum) actually do?

This is the document most families don't have. It's also the document most likely to prevent the kind of dispute the reader at the top of this article described.

A letter of intent (sometimes called a personal property memorandum, depending on state and context) is a written document listing specific items and the specific people you intend to inherit them. "My grandmother's emerald ring to my daughter Sarah. My gold watch to my son David. The coin collection to my son Michael."

The legal status depends on the state and on whether your will incorporates the document by reference.

In approximately 35 US states, including most that have adopted Uniform Probate Code §2-513 or equivalent statutes, a personal property memorandum is binding when (a) the will explicitly incorporates it by reference, (b) the document is signed and dated by the testator, and (c) it describes tangible personal property (not money, securities, or real estate).
In the remaining states, the document is not legally binding but is typically respected by executors and courts as evidence of the decedent's wishes.

In all states, a letter of intent provides three valuable functions even when it isn't strictly binding:

Names which specific item goes to which specific person. Avoids the residual-distribution problem.
Documents the decedent's wishes for the family. Most disputes are resolved by clear evidence of intent.
Reduces conflict. When the decedent's wishes are clearly stated, siblings argue less.

Recommended for: Every household with meaningful personal property — jewelry, watches, art, family items with sentimental value. The cost is zero. The time investment is roughly an hour. The conflict avoided is meaningful.

See our letter of intent for jewelry guide for templates and state-specific notes.

Generate a free letter of intent in 5 minutes — covers your physical heirlooms

What does a Heir Protocol actually do?

Disclosure: this is the product I built. I'll keep this section honest by stating clearly what it doesn't do.

A Heir Protocol is the documented inventory layer that sits underneath the legal documents. For each item you own — ring, bracelet, watch, gold bar, coin, Bitcoin holding — the protocol records:

A photograph of the item
The karat or purity (for metal items)
The weight in grams (for metal items)
The current spot valuation (updated daily for gold and Bitcoin; periodically for other items)
The beneficiary you've designated for that specific item
Any documents associated with the item (receipts, certificates, prior appraisals)
The physical location or custody arrangement

The protocol does four things the legal documents don't.

It exists before death. Your family can see what you have, where it is, and what it's worth — both before and after the inheritance moment.
It values continuously. Gold and Bitcoin spot prices change daily. A 2022 appraisal in a will or trust is stale; a Heir Protocol entry is current.
It generates the letter of intent automatically. Each item has a designated beneficiary; the protocol assembles the letter of intent for you.
It handles the Bitcoin custody handoff. For self-custody, multi-sig, or multi-institution custody, the protocol documents the architecture and the steps your beneficiary needs to take.

The protocol does NOT, alone:

Function as a will, trust, healthcare directive, or power of attorney.
Provide legal advice on tax structure, trust design, or beneficiary planning.
Replace probate or replace the legal force of the will or trust.

Recommended for: Any household with meaningful physical heirlooms, gold, or Bitcoin. The free tier covers up to five items. The paid tiers cover unlimited items and additional inheritance features (executor handoff, multi-party access, automated revaluation).

Not recommended as a standalone solution. Heir Protocol is the documentation layer on top of the legal layer. Build the legal layer first (will + trust if applicable + healthcare directive + POA), then add Heir Protocol for the physical and Bitcoin assets.

Which combination fits your situation?

Four common situations, four honest answers.

Situation 1: You have no estate documents yet.

Build, in this order:

Will (Trust & Will or LegalZoom, $159–$599)
Letter of intent (free, generated by Heir Protocol)
Heir Protocol (free tier covers up to 5 items)

You can do all three in roughly four hours of work, spread over a weekend. Cost: $159–$599 total.

Situation 2: You have a will, but it's silent on specific heirlooms and Bitcoin.

Add:

Letter of intent (incorporate by reference into the will if your state allows)
Heir Protocol (free tier; upgrade to Vault tier if you have more than five items)

The letter of intent specifically addresses the item-by-item question. The Heir Protocol makes it actionable.

Situation 3: Your estate is large enough to consider a trust.

Build, in this order:

Will + revocable living trust (attorney recommended at this size, $1,500–$5,000 total)
Letter of intent
Heir Protocol

The trust handles real estate, financial accounts, and asset protection. The letter of intent and Heir Protocol handle the physical and Bitcoin layer.

Situation 4: You're a family-office-scale household with multi-million-dollar holdings across jurisdictions.

You already have an attorney. Add:

Letter of intent for personal items (the attorney's standard will template often doesn't go to item-level detail)
Heir Protocol Vault Pro ($99/mo) for physical heirlooms and Bitcoin documentation
Vigil Protocol or equivalent ($200/mo) for household financial document mapping if your spouse needs a complete picture

See our full Heirfolio vs Trust & Will vs LegalZoom vs Vigil comparison for the family-office combination in more detail.

The cost comparison

10-year cost for a complete documented estate plan, across situation types.

Situation	Documents	Year 1 cost	Annual cost	10-year total
Minimal (will only)	Will (Trust & Will)	$159	$0	$159
Basic (will + LOI + Heir Protocol free)	Will + LOI + Heir Protocol free tier	$159	$0	$159
Standard (will + LOI + Heir Protocol Vault)	Will + LOI + Heir Protocol Vault ($29/mo)	$159 + $348	$348	$3,639
Comprehensive (will + trust + LOI + Heir Protocol Vault)	Will + Trust + LOI + Heir Protocol Vault	$2,000 + $348	$348	$5,480
Family office (attorney + Vigil + Heir Protocol Vault Pro)	Attorney-drafted estate plan + Vigil + Heir Protocol Vault Pro	$5,000 + $2,400 + $1,188	$3,588	$40,892

For most households, the comprehensive tier (will, trust, letter of intent, and Heir Protocol Vault) totals roughly $5,500 over 10 years. That is less than most households spend on a single year of car insurance. The cost of not having these documents — a stalled estate, sibling disputes, lost Bitcoin, undocumented jewelry — is often much larger.

The bottom line

Five honest verdicts:

You need a will. Every adult does. Trust & Will or LegalZoom are appropriate for most households; an attorney is appropriate above roughly $1M in estate value or for complex family structures.
You probably need a revocable living trust if your estate is above $150K, you own real estate in multiple states, or you value privacy. Below that threshold, the will alone is often sufficient.
You almost certainly need a letter of intent if you own jewelry, watches, art, or any item with sentimental or family-history value. The cost is zero. The conflict it prevents is meaningful. Most estate disputes are about items the will didn't specifically name.
You need a Heir Protocol if you own physical heirlooms, gold, or Bitcoin — the documentation layer the other three documents don't provide. The free tier covers most households' core collection.
No single document is sufficient. Most households need three of these four. The combination is what works.

Heirfolio is the right answer for the physical-and-Bitcoin layer. It is not the right answer for the legal layer. Build both. The combination is what survives the holder.

Build a free Heir Protocol — covers up to 5 items

Frequently asked questions

Do I need a will if I have a trust?

Yes. Most living trusts are paired with a "pour-over will" that catches any assets not titled to the trust during your lifetime. Without the pour-over will, those assets pass through intestate succession (the state's default rules), which is rarely what you would have chosen. The trust handles the assets you've placed in it; the will handles everything else. The two are complements.

Is a personal property memorandum legally binding?

It depends on the state and on whether your will explicitly incorporates it by reference. Approximately 35 US states recognize a separate personal property memorandum as legally binding when the will references it and the document is signed and dated. In the remaining states, the document is not strictly binding but is typically respected by executors and courts as evidence of intent. See our 50-state inheritance laws guide for the state-by-state specifics.

Can I have a letter of intent without a will?

Yes, but it's much weaker. Without a will, your estate passes through intestate succession (the state's default rules), and the letter of intent has no document to be incorporated into. Executors may still respect the letter as evidence of your wishes, but it has no legal force in most cases. The right approach is to have both: a will that incorporates the letter by reference, and a letter of intent that details the specific items.

How is Heir Protocol different from a will?

A will is a legal instrument that distributes your estate after death and goes through probate. Heir Protocol is a documentation and inventory layer that records what you own, what it's worth, and who you intend to inherit each item. The will provides legal force; Heir Protocol provides the information your family needs to act on that legal force. The two are complements — Heir Protocol doesn't replace a will, and a will alone is insufficient for documenting specific physical items in detail.

Can I do all this without a lawyer?

For most households, yes. Trust & Will and LegalZoom handle will and basic trust creation for $159–$599. Heir Protocol generates the letter of intent for free. The combined work is roughly four hours of focused attention. An attorney becomes valuable above roughly $1M in estate value, for complex family structures (blended families, special-needs beneficiaries, family business succession), or for multi-state real estate. For routine middle-class estates, the DIY tools are appropriate.

How often should I update these documents?

Will: review every 3–5 years, or after major life events (marriage, divorce, birth of a child, death of a beneficiary, large change in assets). Trust: same cadence as the will, plus annually if it contains complex distribution provisions. Letter of intent: update freely as your wishes change; no formal amendment required. Heir Protocol: updates continuously as you add or remove items; valuations refresh automatically for gold and Bitcoin.

Can I revoke or change my letter of intent?

Yes, freely. The letter of intent is not a legally binding contract; it's a statement of your intent that the will can incorporate. You can update it as often as you want, sign and date the new version, and store it with your will. Some states require the letter to be signed and dated to be binding; check your state's specific requirement.

What happens to my Bitcoin if I only have a will?

A will can name Bitcoin as an asset and designate a beneficiary, but it cannot make the Bitcoin accessible to that beneficiary if the custody architecture isn't set up for inheritance. For self-custody, the beneficiary needs the seed phrase or hardware wallet plus the knowledge of how to use them. For institutional custody, the beneficiary needs the institution's contact and beneficiary form. The will points to the asset; the Heir Protocol (or equivalent documentation) provides the operational handoff. Without both, the Bitcoin is at risk of permanent loss. See our Bitcoin custody architecture guide for the framework.

What to do next

If you have no estate documents yet: write the will first. Trust & Will at $159 is the fastest path; an attorney at $1,500+ is the most thorough. Either way, do it this month.

If you have a will but it's silent on jewelry, gold, or Bitcoin: generate a free letter of intent and build a free Heir Protocol. The two together take about an hour and cover the physical-asset layer the will doesn't.

If you have a comprehensive plan and want the documentation layer to match: upgrade to Heir Protocol Vault tier ($29/mo) — unlimited items, live valuations, automated executor handoff when the time comes.

The legal documents are the structure. The documentation is what makes the structure work for your family. Build both.

Build a free Heir Protocol — covers up to 5 items

Michael Tanguma is the founder and CEO of Heirfolio. He previously founded Onramp Bitcoin, a Bitcoin financial services firm focused on multi-institution custody for individuals and institutions. This article was reviewed for accuracy by Diana Cruz, a GIA Graduate Gemologist and Heirfolio's Valuation Lead. Legal terminology and document descriptions verified against the Uniform Probate Code, state-specific statutes for personal property memoranda, and published guidance from Trust & Will, LegalZoom, and the American College of Trust and Estate Counsel. This article is not legal advice; consult a licensed estate attorney in your state for specific recommendations.