# How to Lock Notes on iPhone: Device Passcode or Custom Password > For an eligible note, use its Lock action and the supported Notes authentication method. Decide between the device passcode and a custom Notes password before storing important content. A forgotten custom password can make older locked notes inaccessible. Author: statemaps.net Published: 2026-10-31 Updated: 2026-10-31 Canonical: https://statemaps.net/blog/how-to-lock-notes-iphone ## Quick answer For an eligible note, use its Lock action and the supported Notes authentication method. Decide between the device passcode and a custom Notes password before storing important content. A forgotten custom password can make older locked notes inaccessible. ## At a glance Platform: Notes; device-passcode locking requires compatible software Method: Individual note lock Steps: 4; time varies by setup; backup impact needs separate review. ## Method and verification steps 1. Create an ordinary sample note in a supported Notes account. 2. Open the note's menu and choose Lock if offered. 3. Select the supported passcode or custom-password method and authenticate. 4. Use Notes' Lock Now or lock control, then reopen the sample and rehearse access on another device you depend on. What this does not do: An app-level lock and an individual note lock are different. Resetting a forgotten custom password does not unlock older notes protected by it. For an eligible note, use its Lock action and the supported Notes authentication method. Decide between the device passcode and a custom Notes password before storing important content. A forgotten custom password can make older locked notes inaccessible. ## Should you lock the note or the whole app? An individual note lock protects a supported note through Notes' own locking method. An app-level lock is a separate system control on opening an eligible application. Decide which information and access route you want to protect. Do not assume that an ordinary Notes folder becomes a separately password-protected container. Start with a sample note so you can understand access and recovery before protecting the only copy of important material. ## How should you choose the locking method? Apple supports a device-passcode method and a custom-password method in compatible configurations. The choice changes the credential you must retain and the way access works across devices. Inspect the Notes account involved, since settings can be account-specific. Before choosing a custom password, make a recovery plan that does not depend only on a biometric prompt continuing to work indefinitely. ## What does the device-passcode method mean on another device? Apple describes using each compatible device's own passcode, or the relevant Mac login password, for notes using the device-passcode method. Check compatibility before relying on access from an older device. Rehearse with a sample on the devices you actually use. A successful opening on one iPhone does not establish that every old computer or tablet meets the software requirements for that locking method. ## Why is a custom password different from Face ID? Biometric convenience does not remove the need to retain the custom password. Apple explains that changes to biometric settings or periodic authentication can require the password again. Write down how you would regain access if Face ID or Touch ID were unavailable. Do not store your only recovery information inside the very locked note that depends on it. Verify the supported change or recovery workflow before adding sensitive content. ## What remains visible or temporarily unlocked? A locked note's title can remain visible in the notes list, so avoid putting sensitive details in that title. Apple also explains that opening a protected note can open a session for other notes using the same account or password. Switching between notes is therefore not a reliable test that the session has ended. Use the documented Lock Now or lock control, then reopen the sample to verify a fresh authentication boundary. ## What if the Lock option is missing? Check the note's account and content against Apple's supported locking rules. Some note types or account arrangements do not support the same workflow. Avoid moving important content blindly just to make a menu action appear. Use a simple sample note to distinguish an eligibility issue from a forgotten credential. Read the current support instructions before converting, copying or changing the account that contains information you need. ## What happens if you forget the custom Notes password? A reset for future use is not a universal recovery key for earlier locked notes. Apple warns that it cannot restore access to a note when the required custom password is forgotten and the available access methods no longer work. Preserve any still-working access and consult the documented change workflow before altering authentication settings. Test recovery expectations with ordinary content instead of discovering the limitation after losing access to important records. ## Frequently asked questions ### Can each ordinary Notes folder have its own password? Do not assume so. A note lock, an account's chosen locking method and an app-opening lock are different controls. Inspect the supported workflow for the actual note and account. Putting notes into an organizational folder does not by itself establish a new independent password boundary for that entire folder. ### Can Face ID replace remembering a custom Notes password? No. Apple explains that the custom password can be required again, including after certain authentication changes. Biometrics are a convenient supported access method, not a guarantee that the password will never matter. Keep a suitable recovery plan outside the locked content and verify it before storing important information. ### Does resetting the password unlock all older notes? No. A password reset should not be treated as unlocking notes previously protected by a forgotten custom password. Identify the method and credential that protected the particular note. Preserve any working access, read Apple's current instructions and avoid changing biometric settings while you still depend on them to reach the content. ### Can I use the same locked note on older devices? Compatibility depends on the chosen locking method and software version. Apple specifies version requirements for device-passcode locking. Test a sample on each device you need before moving important information into that workflow. Access on one current phone does not establish support on every older tablet or computer. ### Is locking Notes the same as locking the Notes app? No. A supported note lock protects the individual note through Notes' locking configuration. A system app lock controls opening an eligible application on that device. Inspect both boundaries if relevant, including the credentials and fallbacks involved, instead of assuming one menu action automatically establishes the other control. ### Should I test with important information first? Use an ordinary sample. Lock it, explicitly end the unlocked session with the Notes lock control, then reopen it and check the devices and authentication method you intend to rely on. Understand export and recovery before protecting a sole important copy. The point of the rehearsal is to discover compatibility or password limitations while no irreplaceable information depends on them. ### Why can another locked note open without a new prompt? Notes can keep a secure session open for notes using the same account or password after successful authentication. Moving between notes does not necessarily close that session. Use Lock Now or the documented lock control, then reopen a harmless sample to verify that authentication is required again. ## Sources - [Apple: lock or unlock notes](https://support.apple.com/en-us/102537) - [Apple: choosing a Notes password](https://support.apple.com/guide/iphone/about-setting-the-password-apdeefb92e46/ios) ## Related guides - [How to Hide Messages on iPhone: Previews, Alerts and Their Limits](https://statemaps.net/blog/how-to-hide-messages-on-iphone) - [How to Hide Notifications on the iPhone Lock Screen](https://statemaps.net/blog/hide-notifications-lock-screen-iphone) - [How to Restrict Apps on iPhone with Screen Time](https://statemaps.net/blog/how-to-block-apps-iphone) ## Private photo and document storage For photos and documents you choose to store separately, explore [VaultForYou](https://www.vaultforyou.app/).