If you are having trouble signing in with a passkey, one common cause is having multiple accounts registered on the same device. When prompted to verify your identity, your device may offer you a list of saved passkeys, and it is easy to accidentally select one that belongs to a different account. Please make sure that the passkey you choose matches the email address you entered on the login form. If you are unsure, try removing the email address and retyping it carefully before proceeding with passkey verification.

There are a few other things worth knowing about passkeys. If you have recently changed your device or reset your browser, your passkeys may no longer be available unless they were synced to a cloud account such as iCloud Keychain or a Google account. Some browsers and operating systems also handle passkeys differently, so a passkey created in Chrome may not be immediately accessible in Safari and vice versa, depending on your sync settings. Additionally, if you have a password manager installed it may intercept the passkey prompt and present its own options, which can sometimes cause confusion. If you continue to have trouble, try clearing any cached login state, ensuring your browser is up to date, and checking whether your passkeys are stored in a password manager or your operating system's credential store.