Setting up your 3-key vault for bitcoin (BTC)

Make sure you've checked out our guide to Getting started with Casa Standard. If you're ready to set up your BTC vault, see the instructions below.

First, we'll set up the mobile key.

Tap "Set Up" under your 3-key BTC vault.

Next, tap "Connect Mobile Key."

This will create a key directly on your mobile device in its secure enclave. This is one of the keys that you will normally use to sign and send transactions. Please click here to learn more about the mobile key

You do have the option to add a second hardware key instead of using the mobile key. To see which setup is right for you, see our article on Choosing your 3-key vault setup.

Next, we'll set up your hardware key.

Your hardware device will first need to be initialized. If you haven't already initialized your device, do that now. You will need to initialize your hardware device by following the instructions given in the packaging of your hardware device. We have various hardware device setup tutorials available for you.

Once your hardware device has been initialized, you can tap "Set Up Hardware Key" in your key list and follow the instructions to link the hardware device. An email will be sent to you requesting to "Connect your device."

Click on the "Connect your device" button in the email, connect your hardware device, and follow the instructions.

To view details on how to add your specific device, find your device in Adding hardware devices to Casa.

Example web flow for Ledger. Your signing experience will vary based on your specific device.

Finally, set up the Recovery Key.

Tap "Set Up Security Questions."

During the process of setting up your Recovery Key, you'll set a series of three security questions and answers. The answers to the security questions should be something that only you know, but something you'll be able to remember. We recommend storing these answers in a password manager.

If you ever need to use the Casa Recovery Key, you'll need to answer all of these questions exactly as they were written during this setup process, including symbols and/or spaces.

Review your vault: Performing your first health check

Before depositing any funds, it's worth confirming that all three of your keys are set up correctly. This confirmation is called a health check.

A health check verifies that each key in your vault is accessible and working as expected. It doesn't move any funds. It simply confirms that each key is in a healthy state and ready to sign transactions when needed. Casa will remind you to perform a health check every six months going forward.

To run your first health check:

Tap the "Healthy" indicator below your vault name in the Casa app
Tap your mobile key and follow the prompts to verify it
Tap your hardware key, connect your device when prompted, and verify it

If all keys show as healthy, your vault is fully set up and ready to use. 🎉

You've now set up your 3-key BTC vault! Way to go!

📌 Note: Why does my BTC address change after a deposit?

If you return to your vault after making a deposit and notice the deposit address has changed, this is completely normal. It is not an error and your funds are not at risk.

Your Casa BTC vault uses an HD (hierarchical deterministic) wallet, which automatically generates a new receiving address with each transaction.

The main reason for this is privacy: reusing the same address makes it easier for anyone to trace your transaction history on the public blockchain. Address rotation helps keep your activity more private.

All addresses generated by your vault still belong to you and any funds sent to a previous address will continue to appear in your vault balance.

What's next?

Your 3-key BTC vault is now set up. Here's what we recommend doing next:

Make a small test deposit before moving significant funds. Send a small amount (e.g. 0.0001 BTC) to your vault address, confirm it arrives, then continue with confidence. Note: your BTC vault address will change after each deposit. This is normal and expected.
Read the post-setup checklist for a full walkthrough of first steps as a new vault owner: What Happens Next? Post-Setup Checklist for 3-Key Vault Customers
Set up Casa Pay if you'd like a single-key wallet to store smaller amounts. It only requires your phone to sign and send transactions.