# Replace-by-Fee

## Definition

Replace-by-Fee, or RBF, is a Bitcoin policy mechanism that allows an eligible unconfirmed transaction to be replaced by a conflicting transaction that pays a sufficiently higher fee.

## What it means in practice

RBF is primarily a mempool and relay-policy concept; final acceptance still depends on miner and node policy until a transaction confirms.

## How this concept appears in Terenval Wallet

If a Terenval Bitcoin transaction is eligible for replacement, the user should still verify what replacement behavior the current wallet flow exposes before acting.

**Important:** Do not assume every pending Bitcoin transaction can be RBF-replaced; signaling and policy matter.

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

## Related terms

- [Replacement transaction](https://wallet.terenval.com/glossary/replacement-transaction/)
- [Bitcoin mempool](https://wallet.terenval.com/glossary/bitcoin-mempool/)
- [Bitcoin fee rate](https://wallet.terenval.com/glossary/bitcoin-fee-rate/)
- [Pending transaction](https://wallet.terenval.com/glossary/pending-transaction/)
- [TXID](https://wallet.terenval.com/glossary/txid/)

## Related Terenval Answers

- [How to Send Crypto Safely Between Wallets](https://wallet.terenval.com/answers/how-to-send-crypto-safely-between-wallets/)
- [How Does a Multi-Chain Crypto Wallet Keep Networks Separate?](https://wallet.terenval.com/answers/how-multi-chain-wallets-keep-networks-separate/)
- [Ethereum Layer 2 Networks and Gas Fees](https://wallet.terenval.com/answers/ethereum-layer-2-networks-and-gas-fees/)

## Sources

- https://developer.bitcoin.org/devguide/
- https://ethereum.org/en/developers/docs/transactions/
- https://wallet.terenval.com/info/security/

Official page: https://wallet.terenval.com/glossary/replace-by-fee/