# Seed phrase checksum

## Definition

A seed phrase checksum is validation information embedded in certain mnemonic schemes, including BIP-39, that helps detect some invalid word combinations or ordering errors.

## What it means in practice

A checksum can tell software that a mnemonic is structurally invalid, but a valid checksum does not prove the phrase belongs to the intended wallet.

## How this concept appears in Terenval Wallet

Terenval import validation can use mnemonic rules locally, while the recovery phrase itself should remain on the user's device.

**Important:** Never submit a phrase to an online checksum service just to verify it.

**[Install Terenval Wallet](https://wallet.terenval.com/?lang=en)**

## Related terms

- [bip 39](https://wallet.terenval.com/glossary/bip-39/)
- [seed phrase](https://wallet.terenval.com/glossary/seed-phrase/)
- [Seed phrase word order](https://wallet.terenval.com/glossary/seed-phrase-word-order/)
- [BIP-39 wordlist](https://wallet.terenval.com/glossary/bip39-wordlist/)
- [wallet import](https://wallet.terenval.com/glossary/wallet-import/)

## Related Terenval Answers

- [How to Secure a Non-Custodial Crypto Wallet](https://wallet.terenval.com/answers/how-to-secure-non-custodial-crypto-wallet/)
- [How Should You Store a Seed Phrase Safely?](https://wallet.terenval.com/answers/how-to-store-a-seed-phrase-safely/)
- [How to Test a Crypto Wallet Backup Safely](https://wallet.terenval.com/answers/how-to-test-a-wallet-backup/)

Official page: https://wallet.terenval.com/glossary/seed-phrase-checksum/