If something happens to you, who can find anything?

It's the conversation every family puts off, so here is the practical version, where nobody has to make eye contact.

If you were in hospital next week, or worse, could the people you love keep the household running? Not eventually, after months of detective work. This month, when the electricity bill is paid automatically from an account only you can open and the insurance renewal arrives in an inbox only you can read.

This isn't about wills and lawyers, though you should have those too. It's about the layer underneath: the day-to-day knowledge that lives in one person's head and nowhere else.

What actually gets lost

When families go through this, the hard part is rarely the famous documents like the will or the deed. It's the hundred small things around them:

• Which accounts exist at all. Banks, investments, the pension from two jobs ago.
• What is paid automatically, from which account, and what stops if that account is frozen.
• Which subscriptions to cancel, and which must not be cancelled yet, like the phone number that receives every security code.
• Who to call: the insurance agent, the accountant, the landlord, the one person at the bank who knows the family.
• Where the passwords are, and whether they're current. Often the answer is the family password notebook, with all its problems.

Each of these is trivial while you're here, and a locked door when you're not.

Who needs access to what

Try not to make "give one person everything" the first step. Access should follow responsibility:

• Your partner needs the day-to-day: banking, bills, insurance, medical.
• Whoever would handle your affairs, perhaps a sibling or a grown-up child, needs the map: what exists and where, even if they can't open all of it yet.
• Everyone close to you needs to know one thing: where the instructions are.

That last one matters most. You don't need to brief the whole family on your finances. You need everyone to know which drawer, or which app, holds the handbook.

Why writing it down beats memory

Without a written handbook, most families rely on memory, old chat messages and "I think Mum mentioned it once". Under stress, that falls apart. Grief makes people forget things they knew. Time zones and hospitals make the person with the answer hard to reach. And the person who knew the most is the one everyone is trying to manage without.

A handbook is you, on a calm day, helping them on a hard one. It should say, in plain sentences: these are the accounts, this is what to keep paying, this is what to cancel, this is who to call, and this is where every important document is. A will says who gets what. The handbook says how everything works.

Vault For Us has a Legacy handbook for exactly this. It walks you through first steps, where things are, people to call, a letter and a checklist, and it lists your documents for you. You can print it and keep it with your Recovery Kit. You can also name one legacy person who can ask to open your private documents and notes if something happens to you. Nothing opens for 30 days and you're told straight away, so you can say no if you're still here to say it.

The tool is the smaller half, though. A handwritten version in the same drawer as your Recovery Kit does the job too. What matters is that it exists, that people can find it, and that it's dull: updated in ten minutes a year, not rewritten as a farewell epic.

One honest complication

If you use a service that is end-to-end encrypted, ours or anyone else's, no company can hand your family your data later. That's exactly why you chose it. Access has to be arranged by you, in advance: family members who are already in the vault, and a Recovery Kit on paper that someone you trust can find. Anyone who promises they can help your family get in later can also read your data today.

This weekend's version

Write one page. The accounts, the automatic payments, the three phone numbers, where the documents are and where the recovery code is. Tell two people where it is. You can make it thorough later. Make it exist now.