A letter of last instruction is an informal, non-binding document you write to guide your family and executor through the practical work of settling your affairs after you die. It is not a will, no court enforces it, and it carries no legal weight on its own. What it does is fill the gaps a will leaves open: where your accounts are, who to call, what kind of funeral you want, where the important papers live, and the dozens of small details that otherwise cost your executor weeks of guesswork.
How It Differs From a Will
A will is a formal legal document that directs how your property is distributed. It must meet specific legal requirements, it goes through probate, and a court enforces its terms. A letter of last instruction does none of that. It needs no witnesses, no notarization, and no particular format. Because it is not binding, a court will not honor anything in it that conflicts with your will or trust.
The practical consequence is simple: keep property distribution out of the letter. If the letter says your niece gets the antique clock and the will leaves everything to your spouse, the will wins. Use your will or trust for who gets what, and use the letter for everything else.
There is one risk worth knowing about. In roughly half of U.S. states, a handwritten document that looks enough like a will can be treated as one. These are called holographic wills, and they generally have to be written and signed in your own handwriting. If you write your letter by hand and include language that sounds like you are giving property away (“I want my son to have the house”), a court could potentially treat parts of it as a holographic will and create conflict with your actual estate plan. The simplest protection is to type the letter, label it clearly as non-binding, and keep asset distribution out of it.
What to Include
The value of the letter is that it gathers scattered information into one place. Your executor will be making decisions under time pressure, and a thorough letter saves them from hunting through filing cabinets and inboxes during one of the worst weeks of their life.
People to Contact
List the people who should be notified of your death, with phone numbers and email addresses. Start with immediate family, then close friends, your employer or business partners, and the professionals who handle your affairs: your attorney, financial advisor, accountant, insurance agent, and doctor. Add any religious community, fraternal organization, or veterans’ group you belong to. Your executor will not know everyone in your life, and the list keeps anyone from being overlooked.
Financial Accounts and Insurance
Provide an inventory of your financial life. For each account, give the institution name, the type of account, and enough identifying information for your executor to locate it. Cover bank accounts, brokerage and retirement accounts, life insurance policies, annuities, and any other financial products. Note which accounts have named beneficiaries, since those assets typically pass outside probate regardless of what the will says. List outstanding debts too (mortgage, car loan, student loans) with the lender and approximate balance.
Funeral and Memorial Wishes
Your family will face decisions about burial or cremation, often within days. If you have preferences, spell them out: the type of service, religious or secular readings, music, whether you want a viewing, and where you want to be buried or have ashes scattered. If you have prepaid arrangements, include the funeral home’s name, address, and contract number. These wishes are not legally enforceable through the letter, but most families honor them when they are clearly stated.
Location of Important Documents
Tell your executor where to find everything: your will, trust documents, deeds, vehicle titles, birth and marriage certificates, Social Security card, military discharge papers, recent tax returns, and any prenuptial or postnuptial agreements. Be specific. “The filing cabinet in the home office, second drawer, blue folder” is more useful than “at home.”
Pet Care
If you have pets, name the person you want to care for them and include that person’s contact information. Add the veterinarian, medications, dietary needs, daily routine, and any behavioral quirks a new caretaker should know. Informal instructions in a letter are a good start, but they are not enforceable. If long-term pet care matters to you, ask your estate planning attorney about a pet trust. Most states allow enforceable trusts for animal care, where a trustee manages designated funds and a court can step in if the money is misused. The two documents work together: the trust provides legal protection and funding, the letter provides the daily details no legal document would include.
Personal Property and Sentimental Items
Wills are not well suited to items with emotional but little monetary value: family photos, recipe collections, a grandfather’s watch, holiday decorations. The letter is a reasonable place to say who should receive those items and why. Some states also allow a separate written memorandum referenced in your will that can be legally binding for tangible personal property, so ask your attorney whether that option makes sense alongside the letter.
Taxes and Benefits Your Executor Will Handle
Your executor will have to file your final federal income tax return and may need to deal with employer benefits, Social Security, and veterans’ benefits. You do not need to explain any of that in the letter. What helps is giving them the raw material: the name and contact information for your tax preparer, the location of prior-year returns, a note about any estimated tax payments made for the current year, your Social Security number’s location, and (if you served) your branch of service, discharge status, and where your DD-214 is stored. If you are employed, note the employer contact who handles benefits.
Digital Accounts and Passwords
Your digital life creates its own problem. Email accounts, social media, cloud storage, cryptocurrency wallets, online banking, streaming subscriptions, and domain names all have to be addressed after your death. Nearly every state has adopted a version of the Revised Uniform Fiduciary Access to Digital Assets Act, which gives executors the ability to access and manage digital accounts, but the process is often slow. Providers can require court orders and may restrict access to only what is “reasonably necessary” to settle the estate.
Your letter should list every digital account you want your executor to know about, with the platform and your username. Do not write passwords in the letter itself. Anyone who handles the document can see them, and if the letter is ever included with probate filings, those credentials become part of the public record. Use a dedicated password manager with an emergency access feature instead. LastPass and Dashlane let you designate an emergency contact who can request access after a waiting period you set. 1Password generates an emergency kit that can be printed and stored in a sealed envelope in a fireproof safe or with your attorney. The letter simply tells your executor which password manager you use and where to find the emergency access credentials.
Cryptocurrency raises the stakes further. Without the private keys or recovery phrases, those assets may be permanently inaccessible. Treat that information with the same security you would give a safe combination, and make sure your executor knows the access method exists.
Keep Sensitive Numbers Out of the Letter Itself
One of the most common mistakes is loading the letter with sensitive data. Social Security numbers, full account numbers, and login credentials create real identity theft exposure if the document is seen by the wrong person. Deceased individuals are frequent fraud targets because the theft often goes undetected for months. The Identity Theft Resource Center recommends that survivors immediately notify all three credit reporting agencies to flag the deceased person’s credit file, but prevention starts with limiting where sensitive numbers appear in the first place.
The safer approach is to keep full account numbers and Social Security numbers out of the letter. Use partial identifiers (the last four digits of an account, for example) along with enough context for your executor to find the account. Store a separate, more detailed inventory with full numbers in a fireproof home safe or a password-protected digital vault. The letter should tell your executor that this separate inventory exists and exactly how to access it. If you work with an attorney, they can also hold a sealed copy.
Coordinating With Your Other Estate Documents
The letter works best when it fits alongside your legally binding documents instead of overlapping with them. Your will governs property distribution. Your trust, if you have one, controls the assets you have transferred into it. Your advance directive and healthcare power of attorney govern medical decisions while you are alive but incapacitated. Your financial power of attorney authorizes someone to manage your money during your lifetime. The letter handles what sits outside those boundaries: preferences, logistics, and context.
A useful practice is to reference the letter in your will. A sentence acknowledging that a letter of last instruction exists and identifying where it is kept helps your executor know to look for it. The reference does not make the letter binding; it just connects the two documents.
Writing and Storing It
There are no format requirements. Some people write a narrative letter in their own voice. Others prefer a structured checklist organized by topic. Either approach works as long as the information is clear and easy to find under stress. Label the document with your full name, the date, and a statement along the lines of “This is a personal letter of instruction and is not intended as a legal document.” That language helps head off any argument that you meant it to function as a will.
Storage matters as much as content. Keep the original somewhere secure but accessible without legal proceedings. A fireproof safe at home is a good choice. A safe deposit box is not. Banks typically restrict access to a safe deposit box after the owner’s death, and your executor may need letters testamentary from the probate court before the bank will allow them to remove anything. If the letter is locked inside, it cannot do its job during the window when your family needs it most.
Give copies to the people who will need them: your named executor, your spouse or partner, and your attorney. Tell each of them where the original is kept. If you store a digital copy, make sure it is encrypted or password-protected and that your executor knows how to open it.
Keeping It Current
A letter that reflects your life from five years ago can create more confusion than no letter at all. Review it once a year, and update it after any major change: marriage, divorce, birth, death, a new financial account, a move, or a change in your estate plan. When you update it, write the new date prominently on the first page and destroy the old version. Replace any copies you have distributed. Outdated copies with old account numbers or former contacts will send your executor chasing information that no longer exists.