How to sign with a hardware device without email access

In order to send funds from your Casa multisig wallet, you need to approve the transaction using one or more hardware devices. 

Normally, when you need to apply a signature to a transaction, you conveniently receive an email with a link you can click that takes you where you need to go to sign that transaction.

NOTE: The following only applies to hardware device types that do not use QR code signing. Some device types we support leverage QR codes and device cameras to request and apply the signature. A laptop or desktop computer is not needed for these device types. See also: Supported platforms and hardware device firmware.

This convenient process of applying a signature by clicking a link in your email, however, is dependent on the infrastructure of your email provider. 

Email providers are not immune to outages, and they have the right to restrict user access to their platforms at their discretion. This is why we offer the ability to obtain a transaction signature link without needing to rely on an email provider.

The ability to sign without email can be useful if:

  • Your email service is temporarily down
  • You are locked out of your email account
  • Casa’s email service is experiencing a delay

How does it work?

If your email hasn't arrived or you cannot access it, tap "I Didn’t Get The Email."


This will open up a share menu giving you direct access to the signing link.

When you have the signing link, you'll need to copy that link over to your computer to sign the transaction.

How do I get the link from my phone to my computer without manually entering it into the URL field of my browser?

If you're using an iPhone and Mac, you can use AirDrop to send the signing link instantly from your iPhone to your Mac.

If you're not set up for AirDrop, you can also send a message to yourself containing this link using a different service that you can access from both your phone and your computer. You would simply copy the link address URL from the phone, then paste it into a place where you can send it to yourself. Some examples of messaging apps that can be used on both your phone and your desktop/laptop computer are: 

  • Signal
  • Wire
  • Keybase

This feature is just one example of how Casa eliminates single points of failure and adds robustness to your security setup.

By removing reliance on email providers, your sovereignty level increases.

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