Letters before deployment: what to write to your family, just in case

A letter before deployment is a just-in-case letter: words for your partner, children or parents that they'll have if you don't come home. Write one to each person, keep it to a page, and make it about them, not about danger. Then leave it somewhere it will be found, alongside your military's own paperwork, not instead of it.

Most service members who write these letters come home and never need them. Many say the letter was still worth writing, because it made them say things out loud, or on paper, that had gone unsaid for too long.

Why write a letter before deployment?

Because it's the one thing you can control. You can't control what happens on deployment, but you can make sure the people you love have your words, in your voice, whatever happens.

There's a quieter benefit, too. Sitting down to write these letters often clarifies what you want to say before you leave. Some people end up saying it in person at the airport, and the letter goes back in the drawer unopened. That's a good outcome.

This guide focuses on the personal letter. For the general shape of a letter like this, our main guide on what to write in a goodbye letter goes deeper.

Who should you write to?

Start with the person you'd most regret not writing to. For many, that's a partner. Then work outwards.

Your partner

This is often the hardest and most important letter. They'll be the one holding everything together. Tell them what your life together has meant, and give them clear, loving permission to keep living, including to be happy again one day. If there are practical things only you know, put them in a separate note so the letter can stay a letter. Our guide to writing a letter to your partner has more prompts.

Your children

Write to each child separately, at the age they are now, but knowing they may read it again and again as they grow. A small true story about them is worth more than advice. If they're very young, write to the person they'll become. Our guide to writing a letter to your child covers what to include and what to leave out.

Your parents

Parents of service members carry their own particular worry. A letter thanking them for raising you, and telling them you chose this path knowing what it meant, can bring real comfort. Keep it simple.

Siblings and close friends

Optional, but often treasured. A few lines are enough.

What should a deployment letter say?

The best just-in-case letters follow a simple shape:

1. A specific memory. One moment you shared, told in detail.
2. What they mean to you. Plainly, without hedging.
3. One hope for them. Not a list of instructions.
4. Permission. To grieve, to laugh again, to live fully.
5. A plain goodbye. "I love you" is enough.

Keep it to a page. Write as if you're talking to them across the kitchen table. Leave out operational details, anything you're not allowed to share, blame, regrets about the mission, and long instructions.

Example letters

These are starting points. Change every word that doesn't sound like you.

What about the official paperwork?

A letter is personal. Official forms are what actually decide who is told, who is contacted and who receives benefits. Keep them current before every deployment, and follow your own military's guidance and briefings, which will be more specific than anything here.

In the US, two forms matter in particular. DD Form 93, Record of Emergency Data, lists who should be notified if you're injured or killed and who should receive certain payments. Your SGLI beneficiary designation decides who receives your Servicemembers' Group Life Insurance. Many service members are also encouraged to make a will and set up powers of attorney before deploying; base legal offices often help with these at no cost.

Other militaries have their own equivalents. In the UK, for example, personnel are expected to keep next of kin and emergency contact details up to date and are encouraged to make a will. Wherever you serve, your unit, legal office or welfare team can tell you what's required.

Where should you leave the letters?

Paper letters are traditional for a reason. Seal each one in an envelope with the person's name and a clear note, such as "To be opened only if I don't come home". Leave them with someone you trust who isn't the recipient, perhaps a sibling, a parent or a close friend, and tell them what to do. Some people keep a copy in a fireproof box at home and make sure one person knows where.

Avoid leaving letters where the recipient might find them by accident. A partner finding a goodbye letter halfway through a tour can be very hard.

How do check-ins work when comms are limited?

If you want your letters delivered digitally, a dead man's switch can hold them. But deployment is a hard case for any switch, and you should go in with your eyes open.

Communications may be restricted, unreliable or switched off entirely for long stretches. A weekly rhythm would be impossible. Even monthly might be too tight. And remember: official notification of a death comes through the military, not through an app. A switch should never be how your family learns anything. Its job is only to make sure your letters reach them afterwards.

If you choose to use one, set it up so that silence on its own can never send anything:

• Choose a long rhythm. Quarterly, or even yearly, with generous reminders.
• Name a verifier at home. Someone, perhaps a parent or sibling, who would know through official channels if something happened, and who can confirm or reassure.
• Use verifier-confirmed release. Set each letter to release only when a verifier confirms, so a missed check-in during a comms blackout never sends anything on its own.
• Tell your family. Explain that if you miss a check-in, they may get a gentle alert with no personal content and a "they're okay" link, and what it means.
• Use pause mode thoughtfully. If you know you'll be out of contact, pausing avoids false alarms. Just remember that while paused, nothing will be released.

Where Sealkept fits

Sealkept holds messages, each addressed to one person: a letter, a voice note or video you record in your browser before you go, or scans of papers they'll need. You can upload recordings from your phone too, such as a bedtime story for each child. You check in weekly, monthly, quarterly or yearly with one tap in the app or one click in an email. If you miss a check-in, there are reminders, optional verifiers, a soft alert to recipients with a "they're okay" link, and a grace period you choose before anything is delivered. Each letter can have its own release rule, including "only when a verifier confirms", which suits deployment well. Recipients get an email with a private link to only their messages, where they can play any recordings and download everything. Everything is encrypted at rest.

It isn't an official notification system and doesn't replace your military's forms or a will. Our page for travellers and people often out of contact explains how long rhythms, pause mode and verifiers work when you can't always check in.

Write the letters before you pack. With luck, you'll read them back yourself one day, at home, and smile. And if you'd like them kept safe until then, Sealkept can hold them quietly.