A letter of instruction is an informal, non-binding document that tells the people you leave behind where everything is and what you want done. It is not a will and it carries no legal force in Arizona — but it is often the first thing your family actually reads, and the difference between a week of phone calls and six months of guesswork. Think of it as the human-readable companion to your legal documents.
Bottom line up front
- It is not legally binding. It cannot transfer property, name a guardian, or override your will, trust, or a beneficiary designation.
- Two different documents share the name. The estate-planning letter (this article) is not the “letter of instruction” a bank hands you after a death — that one is covered separately.
- It should never contain your passwords. Point to where credentials live instead.
- Arizona specifics matter. Community property, beneficiary deeds, and the small-estate affidavit limits all change what your family needs to know.
- Update it far more often than your legal documents. Your will can sit for a decade. Your letter goes stale in a year.
What a letter of instruction actually is
Your will and your trust answer the legal question: who gets what, and who is in charge?
Your letter of instruction answers the practical one: where is it, who do I call, and what did you actually want?
Those aren’t the same question. A perfectly drafted trust still leaves your successor trustee at a kitchen table wondering which bank holds the operating account, whether the old employer’s life insurance is still in force, and whether you wanted to be cremated. None of that belongs in a legal instrument. All of it belongs in a letter.
It goes by a lot of names — letter of instruction, letter of intent, legacy letter, “the binder letter.” The label doesn’t matter. The function does.
It’s not about documents. It’s about direction.
The two documents people call a “letter of instruction”
1. The estate-planning letter of instruction. You write it, addressed to your family, executor, or successor trustee. Non-binding, informal, any length you like, and it sits with your estate plan. That’s the document this article walks you through.
2. The bank’s letter of instruction. A financial institution gives this to you — usually after a death, or when you’re retitling an account into a trust. It’s their own form, it directs them to disburse or retitle specific funds, it almost always has to be notarized, and it must be accompanied by proof of your legal authority to act.
If a bank has asked you for a letter of instruction, you need the second one: what a letter of instruction to a bank is and what has to go with it.
What a letter of instruction cannot do
People sometimes try to use a letter to fix a gap in their plan. It doesn’t work, and it can make things worse by creating a conflict between documents. A letter of instruction cannot:
- Transfer property. In Arizona a will must be in writing, signed by you, and signed by at least two witnesses (A.R.S. § 14-2502). A letter meets none of that. If you want someone to receive an asset, it goes in the will, the trust, a beneficiary designation, or a deed.
- Override a beneficiary designation. Your 401(k), IRA, and life insurance pay whoever is named on the form at the custodian. A letter saying “I want my daughter to have the IRA” loses to a form that still says “my ex-spouse.” Every time.
- Name a guardian for your minor children. That nomination belongs in your will.
- Give anyone authority to act. Authority comes from a power of attorney while you’re alive, and from court-issued Letters of Appointment or your trust after you die. A letter persuades; it doesn’t empower.
- Change your trust. If the letter contradicts the trust, the trust controls — and you’ve handed a disappointed beneficiary an argument.
What to include: the checklist
Work through these nine sections. You don’t need to finish in one sitting, and you shouldn’t wait until it’s perfect. Go with your gut today. You can always amend it later.
1. Who to call first
A short list with phone numbers: your estate planning attorney, CPA, financial advisor, insurance agent, business partner. Name the people, not just the firms — firms answer the phone slowly, people call back.
2. Where the documents are
The physical location of the original signed will, the trust, deeds, powers of attorney, vehicle titles, marriage certificate, military discharge papers (DD-214), and any prenuptial agreement. If there’s a safe, say where the key or combination is held — not what it is. If there’s a safe deposit box, name the bank, branch, and who else has access.
3. The Asset Table
This is the heart of it. Every major asset, roughly what it’s worth, and — critically — how it’s titled and who’s designated on it. Bank and brokerage accounts with institution names and last four digits. Real property by address. Retirement accounts and their named beneficiaries. Life insurance with carrier and policy number. Business interests. Vehicles. Most families discover assets they didn’t know existed and miss assets they did; a list you update once a year prevents both. The Asset Table turns guesswork into clarity.
4. Debts and recurring obligations
Mortgages, HELOCs, car loans, credit cards, personal guarantees on business debt, anything on autopay. Personal guarantees are the ones that ambush families — a business obligation you signed for personally doesn’t die with the business.
5. Digital life
Name your password manager and say who holds the master credentials or emergency-access designation. List the accounts that matter: email, cloud photo storage, domain registrars, social media, crypto wallets, subscriptions quietly bleeding money. Note whether you’ve set up Apple’s Legacy Contact, Google’s Inactive Account Manager, or a Facebook legacy contact.
Do not write actual passwords in this letter. It gets copied, scanned, and emailed. Point to where the credentials live instead.
6. Funeral, burial, and disposition wishes
Burial or cremation, where, what kind of service, who speaks, whether you want a viewing. Prepaid arrangements and the funeral home’s name. Organ donation. This is the section families are most grateful for, because it’s the decision they face in the first 48 hours, while nobody is thinking clearly.
7. Care instructions for those who depend on you
Pets — who takes them, the vet, medications, feeding routine. A pet trust handles the money; the letter handles the daily reality. If you’re caring for a parent or a special-needs adult child, describe the routine, the providers, and the benefits that must not lapse.
8. Business continuity, if you own one
Who keeps operations running on day one. Where the operating agreement, buy-sell agreement, and key-person policy live. Payroll provider, bank, and who has signing authority. Which employees and customers should hear from someone immediately, and who makes that call. Most businesses don’t die from bad ideas. They die from a lack of succession planning.
9. The personal part
The part nobody regrets writing. Why you made the choices you made — especially the ones that might sting. If you left shares unequally, or named a professional trustee instead of your oldest child, explain it in your own voice. A short paragraph of reasoning has defused more family fights than any no-contest clause.
This is also where a legacy letter belongs, if you want one. Estate planning isn’t about fear — it’s about love.
Arizona-specific items to address
A generic template pulled off the internet will miss these, and in Arizona they change the practical answer.
Community property and how things are titled
Arizona is a community property state. Whether an asset is community property, your separate property, or held as community property with right of survivorship changes what happens at death and what your surviving spouse has to do. Say how the major assets are titled — your family can’t reliably reverse-engineer it from a statement.
Beneficiary deeds on real estate
Arizona lets you record a beneficiary deed that transfers real property at death without probate (A.R.S. § 33-405). If you have one, say so and say where it’s recorded — a family that doesn’t know it exists may open a probate that wasn’t necessary. If you have one and a trust, note which property each covers. See our guide to Arizona beneficiary deeds.
Whether your estate may qualify for a small-estate affidavit
Arizona allows small estates to bypass formal probate by affidavit. As of the 2025 increase, the limits are up to $200,000 in personal property and $300,000 in real-property equity, with liens and encumbrances deducted, after waiting periods of at least 30 days for personal property and six months for real property. If your estate is likely to land under those limits, one sentence in your letter can save your family a court case. Details: what a small estate affidavit is in Arizona.
Your trust and the certification of trust
If you have a revocable living trust, your successor trustee usually does not have to hand the whole trust document to a bank. Arizona allows a certification of trust (A.R.S. § 14-11013) — a short summary proving the trust exists, who the trustee is, and what powers they hold. Saying so saves your trustee from mailing your family’s private dispositive terms to a call center.
Taxes
Arizona has no state estate tax and no inheritance tax. Federally, the estate and gift exemption is $15 million per person / $30 million per married couple in 2026, now permanent and inflation-indexed. Most Arizona families owe no estate tax at all — but point to your CPA and your last few returns anyway, because income tax filings still have to happen.
The assets that are not in the trust
Almost every plan has some: retirement accounts that shouldn’t be retitled, a vehicle, a small account someone forgot. Say which assets sit deliberately outside the trust and why, so your trustee doesn’t spend three months assuming something is missing.
This is where plans quietly fail. A trust is like an empty box — if you don’t put anything inside it, it can’t hold or protect anything. An unfunded trust isn’t a plan. It’s a very expensive paperweight. If you’re not certain what’s inside yours, start with funding a trust.
How we use this in practice
At AVID Esq. Group, the letter of instruction isn’t a form we email you after the fact. It comes out of the same session where we draw your plan on the whiteboard — Planning You Can See. Most attorneys talk you through your plan; we draw it out so you can see it. Once you can see it, the gaps get obvious: the account nobody named a beneficiary on, the rental property still in your individual name, the successor trustee who has no idea where anything is. The Asset Table and Funding Roadmap from that session are what make the letter easy to write — you’re not staring at a blank page, you’re describing something you already mapped. We don’t prescribe — we educate.
Where to keep it, and who gets a copy
- With your estate plan, not inside it — same drawer as the originals, but a separate document, so nobody mistakes it for part of the will.
- Give a copy to the people who’ll need it: your executor or successor trustee, your spouse, ideally your attorney. A letter nobody can find on the worst day of their life has done no work at all.
- Watch the safe deposit box. If the letter is the only thing that says where the will is, and it’s locked in a box only you can open, you’ve built a loop.
- Date every version and destroy the old ones. Two undated letters with conflicting instructions is worse than one stale letter.
Common mistakes
- Putting passwords in it. Point to the password manager instead.
- Trying to make gifts in it. “I want Sarah to have the ring” in a letter is a wish. In the will, it’s a bequest.
- Contradicting the legal documents. Conflicts create litigation.
- Writing it once and never touching it again. Accounts close, advisors retire, numbers change.
- Hiding it too well. The most common failure isn’t a bad letter — it’s a good letter nobody found.
- Skipping the “why.” The explanations are what keep siblings talking to each other.
Frequently Asked Questions
Is a letter of instruction legally binding in Arizona?
No. It has no legal force in Arizona. It cannot transfer property, appoint a fiduciary, or override your will, your trust, or a beneficiary designation. Its value is practical, not legal. Anything you need to be enforceable has to go in a properly executed legal document — Arizona requires a will to be in writing, signed by you, and signed by at least two witnesses (A.R.S. § 14-2502), and a letter meets none of that.
Does it need to be notarized or witnessed?
No. Because it isn’t a legal instrument, Arizona imposes no signing formalities — no witnesses, no notary. Signing and dating it is still worth doing, because it shows the letter is genuinely yours and establishes which version is most recent. Note the contrast with the bank version, which usually does have to be notarized, because the bank is relying on it to move money.
What’s the difference between a letter of instruction and a will?
A will directs who receives your property, names your personal representative, and nominates guardians for minor children. It must satisfy Arizona’s execution requirements and it goes through probate. A letter of instruction is an informal, unenforceable companion that explains where assets are, who to contact, and why you decided what you decided. The will controls the legal outcome; the letter makes that outcome achievable. You want both.
What’s the difference between a letter of instruction and a letter of intent?
In estate planning the terms are used more or less interchangeably. “Letter of intent” carries one extra meaning, though: in special-needs planning it usually means a detailed document describing a disabled beneficiary’s routines, medical history, providers, and care needs — information a future caregiver or trustee could not reconstruct. If you have a family member with a disability, that deserves its own effort alongside a special needs trust.
Who should I address it to?
Whoever will be doing the work: your personal representative if your plan runs on a will, or your successor trustee if it runs on a trust. Many people write one general letter to the family plus a shorter operational letter to the fiduciary. If you own a business, a separate note to your partner or key employee is worth writing — their day-one problems are completely different from your family’s.
How often should I update it?
Once a year, and after a death, birth, marriage, divorce, move, new or closed account, property sale or purchase, business change, or a change in who you’d put in charge. Legal documents can go five or ten years between updates. A letter of instruction goes stale much faster, because it’s made of phone numbers and account names.
Can a letter of instruction be challenged?
Not the way a will can be — there’s nothing to contest, because it grants nothing. But it can be used in a dispute. If your letter conflicts with your trust, a beneficiary who dislikes the trust’s outcome will point at the letter as evidence of what you “really” wanted. That’s why it should be reviewed against your legal documents rather than written in isolation.
Put the direction in writing
Your legal documents decide who gets what. Your letter of instruction decides whether that happens in three weeks or three years — and whether your family spends that time grieving or investigating.
You are either leaving behind clarity — or chaos.
If you’d like help building the Asset Table behind the letter, or you’re not sure the plan you signed years ago still matches your life, we’ll walk through it with you. Book a free consultation or call (480) 805-4357. Let’s protect what you’ve built and the people you love.
Related reading: Beneficiary Letter of Instruction · What Is a Letter of Instruction to a Bank? · Wills · Trusts · Powers of Attorney
Verify these facts before publishing
- A.R.S. § 14-2502 — will execution: writing, signed by testator, signed by at least two witnesses. Confirm current text and whether the holographic-will alternative (§ 14-2503) should be mentioned.
- A.R.S. § 33-405 — Arizona beneficiary deed statute cite.
- A.R.S. § 14-3971 — small estate affidavit: $200,000 personal property / $300,000 real-property equity (2025 increase, HB2116, eff. 6/30/2025); waiting periods 30 days personal / 6 months real property; liens and encumbrances deducted.
- A.R.S. § 14-11013 — certification of trust; confirm the listed contents are described accurately.
- Federal exemption — $15M individual / $30M couple for 2026, permanent and indexed (OBBBA, PL 119-21). Confirm before publish.
- Arizona has no state estate tax and no inheritance tax — confirm still accurate.
- Community property characterization — confirm the description is stated at the right level of generality for a public article.
- Editorial: existing post 11610 “Beneficiary Letter of Instruction” (2,551 words) targets overlapping terms. Decide whether to consolidate, 301-redirect, or keep both with the cross-links used here.
- Note: this article deliberately says nothing about the FinCEN residential real-estate reporting rule, which was vacated in Flowers Title v. Bessent (E.D. Tex. 2026) and is on appeal. Several competitor blogs incorrectly state it took effect 3/1/2026.
