Prepare an account recovery plan before you need it.

1. Map the accounts that unlock other accounts

List a few essential services and how you normally sign in to each. Note whether the second step comes from a phone, an authenticator, a security key, or another method. Record where you would find the official recovery instructions, without copying passwords or codes into the same ordinary planning document.

Pay attention to a loop: account A depends on account B, while account B can only be recovered through A.

2. Check the recovery information already saved

Open the official security settings and confirm that listed contact details still belong to you and remain accessible. Google’s guidance places recovery phone and email controls under Security & sign-in. It recommends a recovery email different from the address used to sign in, and warns against a Google Voice number that could depend on access to the same account.

Google also notes that options vary by account, device, and region, and that some changes can take time to become effective. Follow the confirmation steps shown. Do not remove a working route merely because you entered a replacement; first check what the service says is active.

Sources: [1]

3. Prepare a supported backup method

Some services provide backup codes for their second sign-in step. Google’s backup-code feature requires 2-Step Verification; each code works once, and generating a new set invalidates the previous set. Its Advanced Protection Program has different availability. Use the instructions for your actual account rather than assuming the option exists everywhere.

Keep codes in a protected location you can reach if the usual device is unavailable. Google suggests that a printed copy can be stored with important documents. Do not paste codes into a shared worksheet, send them to a helper, or include them in a screenshot of your recovery plan.

Sources: [2]

4. Walk through a lost-device scenario

Imagine the phone is unavailable, then read your plan without using anything stored only on that phone. Could you locate the official instructions? Reach the recovery mailbox? Find the protected backup material? Write down the missing dependency and fix it while you still have access.

This can be a tabletop check. You do not need to reset a password, erase a device, or deliberately lock yourself out to find obvious gaps. If you choose to test an alternative sign-in, follow the service’s instructions and account for any one-use code consumed during the test.

5. Review the plan when your setup changes

Before changing a number, replacing a phone, or closing an email account, check which services rely on it. Update the relevant settings and your planning note together. Keep the old device available until you have confirmed the new setup works, where practical.

If you are already locked out, use the service’s official recovery flow or the administrator for a managed account. Keep your expectations tied to that process: a planning worksheet cannot override identity checks or guarantee access. Once access is restored, review the dependency that caused the difficulty.