Addresses, Private Keys & Recovery Phrases

Introduction

Share your receive address with the person sending you crypto. Keep your private key and recovery phrase secret. If you lose access to your wallet, what you need to recover it depends on how you set it up.

Lesson 1 separated logging in from authorizing a transfer. In a typical single-key self-custody wallet, unlocking the app gives you access to it. When you approve a transfer, the wallet uses your private key to sign it.

The BrettWy Wallet Decisions Framework

Use these three questions when someone asks for wallet information or when you’re checking how you would regain access.

Table of Contents

What can I share?

Your receive address tells the sender where to send the crypto. Copy it from the receiving wallet or platform for the asset and network you intend to use. Share it with the intended sender and confirm that they’re using the same asset and network.

For example, if your receiving screen shows USDC on a particular network, ask the sender to confirm that same network before they send. If the screen shows a required memo or tag, send it with the address.

Some receiving platforms also give you a memo or destination tag. If the receiving screen requires one, include it along with the address so the platform can identify the deposit. Follow the requirements shown for that specific deposit.

What must I keep secret?

A private key is secret information your wallet can use to sign a transaction. In a typical single-key account, someone who obtains the private key can sign for that account. Your wallet handles signing when you approve a transfer, so you can make a payment without seeing or typing the key.

A recovery phrase, sometimes called a seed phrase, is an ordered list of words used by many self-custody wallets to recreate the keys they generated. In a compatible setup, one phrase can restore access to several accounts derived from it. That makes the phrase especially sensitive.

What do I need to recover access?

Imagine your phone is lost and you remember the PIN you used to unlock your wallet. In a traditional phrase-based setup, that PIN unlocked the app on the old phone. To restore access on a replacement device, you generally need the original recovery words in the correct order and a recovery method that supports that backup format. The backup restores access to the wallet’s keys so you can use the accounts again.

Check your setup

• Did you add a recovery passphrase? In setups that use one, such as a BIP-39 passphrase wallet, you need the exact passphrase with the backup. A different passphrase can open a different wallet. Your app password or PIN serves a separate purpose.
• Did you import another account? In a standard MetaMask phrase restore, an account imported using a separate private key or recovery phrase may need its original recovery method. Check which accounts your main backup covers.
• Does your wallet use a different backup method? Follow that wallet’s documented recovery process. If you use a custodial platform, its account recovery process governs how you regain access to your login. Lesson 1 on wallet custody

While you still have access, find your wallet’s official recovery instructions and check which backup method applies to you. You can do that without entering your recovery words or wiping your current device.

Key Takeaways

• Share receive details with the intended sender.
• Keep signing and recovery secrets private.
• Check what your wallet requires for recovery.

Frequently Asked Questions

Can someone spend my crypto if they know my receive address?

Knowing a receive address alone does not let someone sign a transfer from it. On public networks such as Bitcoin, they may be able to see activity associated with the address.

Can I use my recovery phrase with any wallet?

Check that the wallet supports your backup format and the account type you’re restoring. If your setup uses a recovery passphrase, you’ll also need the exact passphrase.

Test Your Knowledge

Try answering all three questions before reading the answer key.

1. A friend wants to send you crypto. What do you share and what do you confirm?
2. Someone claiming to be support asks for your recovery words. What do you do and why?
3. You lose your phone and remember your wallet PIN. Can you restore access with the PIN alone? What do you check?

Check Your Answers

1. Share the receive address, confirm the asset and network, and include a memo or tag if required.
2. Refuse. The phrase can give someone access to the accounts derived from it. Keep the private key secret too, since it can sign for its associated account in a typical single-key setup.
3. In a traditional phrase-based setup, the PIN alone won’t restore access. Check for the original backup, a compatible recovery method, any required recovery passphrase, and any separate recovery materials for imported accounts.

Official and Educational Resources

• Coinbase Help — Steps to receive crypto: Receive addresses, supported networks, and when a memo or tag is required.
• Bitcoin.org — Protect your privacy: What sharing a Bitcoin address can reveal.
• Ethereum.org — Ethereum accounts: How private keys sign transactions for externally owned accounts.
• BIP-39 — Mnemonic code for generating deterministic keys: How recovery words and an optional passphrase produce a wallet seed.
• Electrum — Seed Version System: An example of a wallet-specific recovery phrase format.
• Trezor — Passphrase wallet troubleshooting: Why a passphrase-protected wallet requires the exact passphrase.
• MetaMask — Secure your recovery phrase and password: How recovery phrases, passwords, and private keys differ.
• MetaMask — Connect or import an existing wallet: How separately imported accounts are handled during recovery.

Final Thoughts

Share receive details with the intended sender. Protect the secrets that let someone sign or restore access. Check what your wallet needs before you lose the device you use today.

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About This Content

Educational and Risk Disclaimer