Most of us have one. The message typed at 1 a.m. and never sent. The speech you rehearse in the shower. The thing you would say to someone if you knew they would just listen, without interrupting, defending, or leaving.
There is an old, simple way to give those words somewhere to go: write them as a letter you will never send. Therapists use it, grief counselors use it, and you can do it tonight with a pen or a phone. Here’s what an unsent letter is, why it can help, how to write one, and ten prompts to start with.
What an unsent letter is
An unsent letter is exactly what it sounds like. You write to one specific person, directly, as if they will read it, and then you don’t send it. The person can be someone in your life, someone you’ve lost touch with, someone who has died, or a past or future version of yourself.
The “never send” part is the point. A message you plan to send has to be careful. You manage how it will land, you soften it, you leave out the part that might start a fight. A letter nobody will read can be the true version instead.
Family therapist Phil Stark, writing in Psychology Today, describes using unsent letters with clients who are working through their childhoods. His summary of the whole idea: “The letter isn’t really for the parent; it’s for ourselves.” He also notes that many clients feel better without ever sending it.
Why it can help
It is used in grief therapy. In a 2022 paper in the journal OMEGA, Lene Holm Larsen looks at letters written to someone who has died as a clinical tool. She proposes that this kind of letter may help people put feelings into words, approach things they have been avoiding, address unfinished business, and shape a more coherent story about the loss. It’s worth being honest about how strong that evidence is. The paper describes how the method may work rather than reporting a new trial, and it notes that earlier research on grief writing has been inconclusive.
It is a close cousin of expressive writing, one of the most studied writing exercises in psychology. In the classic version, people write about their deepest thoughts and feelings for about 15 to 20 minutes, over three to five sessions. A widely cited review by Karen Baikie and Kay Wilhelm describes a pattern worth knowing in advance: writing often brings a short-term rise in sadness or distress, and the longer-term benefits reported in studies come later. They also point out that results are inconsistent and that writing should add to professional care, not replace it. We cover that research in more detail in our article on what the research says about journaling and mental health.
It removes the audience. This is the part people feel most. When you are not writing for a reply, you don’t have to be fair, calm, or forgiving yet. You can say the thing first and decide what you actually think about it later.
How to write an unsent letter
Pick one person
Not “everyone at work” or “my family.” One person, or one version of yourself. The more specific the reader, the more specific the letter.
Start with their name
“Dear Mom,” “Hey Jordan,” “To me, at 16.” Writing directly to someone feels different from writing about them. It is often the moment the real sentences start.
Write the true version, not the fair one
This is a draft of a feeling, not a court record. You are allowed to be unfair, petty, or too much for a page. Nobody is going to quote it back to you.
Go small and specific
One memory, one moment, one sentence you never said. “The night you didn’t call back” will take you further than “you were never there.”
Write what you needed, too
Not only what they did, but what you wished had happened instead. That part is often the most useful thing in the whole letter.
Give it a time limit
15 to 20 minutes is plenty, and you can stop any time. If it feels like too much, stop, put it away, and come back another day.
Decide what to do with it later
Keep it, reread it in a month, or tear it up. If you ever want to send something, treat that as a separate decision you make days later, when you’re calm. What you send can be a much shorter, kinder cousin of what you wrote.
Letters about grief, family, or someone who hurt you can bring up strong feelings, and a short wave of sadness is common. That’s okay, and you can stop at any point. Writing isn’t a substitute for professional support. If you’re writing to someone who harmed you, don’t send anything without talking it through with someone you trust first. If you’re in emotional distress or having thoughts of suicide, you can call or text 988 to reach the 988 Suicide & Crisis Lifeline, or chat at 988lifeline.org. It’s free and available 24/7 in the US. If you’re in immediate danger, call 911.
10 unsent letter prompts
If you don’t know who to write to, start with whichever of these makes you pause.
- To someone you never got to say goodbye to
- To the friend you slowly drifted away from
- To your younger self, on a day they really needed it
- To someone who hurt you, without having to forgive them
- To the person who has no idea how much they helped you
- To someone you still think about more than you admit
- To the version of you from one year ago
- To your body, for everything you’ve put it through
- To someone you’re angry at but can’t tell
- To your future self, for the day this gets hard again
Where Yasura fits
I build Yasura, a journal app, so read this part with that in mind. The ten prompts above are built into the latest version of Yasura as a free Unsent Letters prompt pack: start a new entry, tap “Write an unsent letter,” and pick one. Yasura works 100% offline, with no account and no cloud, and your journal is encrypted on your device. You can lock it with a PIN, Face ID or fingerprint, and Decoy Mode keeps your entries protected if someone else picks up your phone. That matters for this kind of writing, because a letter only works if you trust that nobody else will read it.
But you don’t need an app for any of this. A notebook, a pen, and a drawer will do the job. The letter is the point, not the tool.
Sources: Phil Stark, LMFT, “The Unsent Letter,” Psychology Today (2025); Lene Holm Larsen, “Letter Writing as a Clinical Tool in Grief Psychotherapy,” OMEGA (2022); Baikie & Wilhelm, “Emotional and physical health benefits of expressive writing,” Advances in Psychiatric Treatment (2005); 988 Suicide & Crisis Lifeline.
Try Yasura
Write the letters you’ll never send, somewhere nobody else will read them. Free Unsent Letters prompt pack inside. Works 100% offline, no account, no cloud, encrypted on your device and locked with your PIN or biometrics. One-time purchase unlocks Decoy Mode and the rest of the premium features.