Trezor One Setup

This article details how to set up (initialize) your Trezor One hardware wallet for use with Casa App.

To begin, verify the integrity of the device box to ensure that it is free from tampering.




Once your Trezor One has been unboxed, head over to in your browser and follow the instructions to begin setup. You’ll connect your Trezor One when prompted, using the provided cord.

If your device is not recognized once plugged in, head over to to download the bridge and resolve this issue.




If this is your first time setting up this device, you'll be asked to do a firmware update.

Casa always recommends getting the latest firmware when initializing a device for the first time, before the key is funded. You can view the latest firmware versions for Trezor here.
Next up, choose “Create Wallet”, and accept the terms & conditions by confirming the action on your device.

Now you’ll need to complete the backup process. Choose “Create a backup in 3 minutes”, click the box, and press continue.

During this backup process, you’ll be prompted to write down the 24 word seed phrase.

Casa multisig allows for a fully "seedless" setup, so if you'll be using this Trezor One exclusively with Casa, then there is no need to write down the 24 word recovery seed.

That being said, you can write down the seed phrase if you choose to. If you ever lose or break the device, the seed phrase will be able to restore the Casa signing key on a new device. 

See: Seedless Multisig for more info on this topic.



You can now click through these words without writing them down; that’s 48 clicks total!

Next, you’ll set the PIN code on your Trezor. It’s very important that you do not forget this, a lost PIN is a lost key! We recommend using the same a 4-8 character PIN (no zeros) across all your hardware devices, and saving it in a password manager.

To set the PIN, use the mixed number panel (map) on the Trezor One device as a guide to correspond with the blank, dotted squares that appear in the browser to select your PIN. You will enter the PIN twice to confirm.



Now you’ll be asked to name your device. We recommend calling this "Home", "Office", or "Safe" to match the key in the Casa App you'll be pairing it with.




The final steps will ask you to set up bookmarks, newsletter & social media with Trezor, but you may click through to skip these steps.



That’s it! Your Trezor One device is now initialized and ready to be added to your keyset.

Finally, keep your Trezor somewhere safe and secret. Though there may not be funds in the wallet yet, keeping it secure and protected from tampering prior to funds placement is very important.


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