Passwordless Sign-In with Passkeys
Lets you sign in without a password using your device's fingerprint, face recognition or PIN. Your password is not deleted; a passkey is an extra option.
Where to find: To add one: Seller panel → Profile → Security tab → Passkey card · To use one: the Sign in with passkey button on the login screen Who it's for: Anyone who wants to stop typing a password at every sign-in and make their account safer In short: Lets you sign in without a password using your device's fingerprint, face recognition or PIN. Your password is not deleted; a passkey is an extra option.
What is it for?
A passkey is a modern sign-in method that replaces the password. Once you set one up you do not type a password on the login screen; you use your phone's or computer's own lock instead:
- Fingerprint
- Face recognition
- The device PIN or password
It has two big advantages over a password:
| Password | Passkey | |
|---|---|---|
| Do you have to remember it? | Yes | No |
| Can it be stolen and used elsewhere? | Yes | No — the key never leaves your device |
| Can it be given away to a fake site? | Yes | No — it only works on the real address |
Your fingerprint or face is not stored on our servers. Your device only sends a "public key"; your biometric data never leaves your device.
First, know this: two different places
Passkeys involve two separate screens. To avoid confusion:
| What do you want to do? | Where do you go? |
|---|---|
| Add, rename or delete a passkey | Seller panel → Profile → Security tab |
| Sign in with a passkey | The login screen (the button under the password form) |
Passkey settings are not on the Security page where two-factor authentication lives; they are on the Profile → Security tab in the seller panel.
Adding a passkey (step by step)
- In the seller panel, go to Profile from your profile menu in the top right.
- Switch to the Security tab.
- Find the Passkey card. Its description reads: "Device keys for passwordless sign-in".
- Click the Add passkey button.
- In the window that opens, give your key a name. It says This device by default; we recommend changing it (for example "iPhone fingerprint", "Office computer").
- Click Continue.
- At this point your device's own window opens (Windows Hello, Touch ID, Face ID or the Android screen lock). Scan your fingerprint or enter your PIN.
- You will see the Passkey added message. Your key appears in the list.
The window in step 7 belongs to your operating system, not to Treyza. It looks different from device to device; that is normal.
The name field can be at most 60 characters and cannot be left empty.
Reading the key list
Every passkey you add appears as a row on the card:
| Information | What it means |
|---|---|
| Name | The name you gave during setup. |
| Synced badge | This key is backed up to your cloud account (iCloud Keychain, Google Password Manager), so it also works on your other devices signed in to that account. |
| Added | The date you created the key. |
| Last used | When you last signed in with it. If never used, it says Never used. |
The top right of the card has a badge showing how many keys you have (like 3 keys); if you have none it says None.
Each row has two icons on the right: a pencil (rename) and a bin (delete).
Signing in with a passkey
- Open the login screen.
- Under the password form you will see an OR divider and the Sign in with passkey button.
- Click the button.
- Your device asks which account you want to use; pick your account.
- Complete the fingerprint / face / PIN check.
- You are signed in.
You do not need to type your email address. Your device lists the saved accounts itself.
If the button is not visible, your browser does not support passkeys. In that case no warning appears — the button simply is not there. Use a current version of Chrome, Edge, Safari or Firefox.
Important: no verification code is asked when signing in with a passkey
Even if two-factor authentication is enabled on your account, when you sign in with a passkey:
- The 6-digit code from your authenticator app is not asked for
- A backup code is not asked for
- The sign-in code sent to your email is not asked for
This is not a gap. A passkey already carries two factors within it: owning the device (not something you know, but something you have) and the biometric/PIN check. That is why no extra code is requested.
When you sign in with your password, two-factor authentication keeps working normally. So adding a passkey does not turn your 2FA off.
What happens to my password?
Your password stays exactly as it is and keeps working. A passkey does not replace it, it is added alongside.
- Adding a passkey does not delete or change your password.
- You can sign in with your password whenever you like.
- Even if you delete all your passkeys, password sign-in still works.
That is why adding a passkey is risk-free: you open a new door, the old one does not close.
Renaming and deleting
To rename, click the pencil icon. Type the new name in the window that opens and press Save. This does not ask for a fingerprint/PIN — only the name changes.
To delete, click the bin icon. A confirmation window appears:
The key "{name}" will be deleted and you will not be able to sign in without a password on this device. This action cannot be undone.
Deleting cannot be undone. If you want to use the same device again you have to add a passkey again (this is easy and takes a few seconds).
If you lost or sold a device, delete that device's passkey here.
Limits
| Rule | Value |
|---|---|
| Maximum number of passkeys | 10 |
| Adding the same device twice | Not possible — the system warns you |
| Time limit for adding/signing in | 5 minutes (if you leave the window open you start over) |
| Key name length | At most 60 characters |
Frequently asked
Can I use a passkey on more than one device? Yes, in two ways. Either you add a separate passkey for each device, or if your key has the Synced badge it automatically works on your other devices signed in to the same cloud account.
If I lose my phone, am I locked out? No. Your password (and your two-factor authentication, if any) keeps working. After signing in, delete the lost device's passkey from the list.
I tried to add the same device twice and got an error. That is normal. The system warns: "There is already a passkey registered for this device." One key per device is enough.
It says "Operation cancelled". You closed your device's verification window or waited too long. Try again.
It says "Passkey could not be verified" and I cannot sign in. Your key may have been deleted. Sign in with your email and password, then add a new passkey from Profile → Security.
Is my fingerprint stored on the server? No. Your biometric data never leaves your device. Only a public key used for verification is kept on the server, and nobody can sign in as you with it.
Do passkeys cost anything? No. Like all security features, they are free.
Should I enable two-factor authentication as well? We recommend it. Even though it is not asked for during passkey sign-in, it keeps protecting you when you sign in with a password. The two together are the safest setup.
Related pages
- Account & Security — Account & Security overview.
- Two-Factor Authentication — Setting up two-factor authentication (2FA).
- User Profile — The profile page in the seller panel.
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