Burner Wallet

Beyond the basic idea of a disposable wallet, the term borrows its logic from a "burner phone": something set up quickly, used for one narrow purpose, and thrown away once that purpose is served. A user typically creates the wallet in seconds through a browser extension or app, funds it with just enough for the transaction and gas, and never links it to an ENS name, profile picture, or exchange account that could tie it back to their identity.

The practice grew alongside the rise of NFT mints and permissionless DeFi, where connecting a wallet to an unaudited smart contract and clicking "Approve" is unavoidable. Many of these contracts request token allowances that, if malicious or exploited, let an attacker drain everything the connected address holds. Wallet-draining scams, often disguised as fake mint pages or airdrop claims spread through hijacked social accounts, have stolen hundreds of millions of dollars from users who approved the wrong signature. By isolating exposure to a near-empty burner, the worst-case loss is capped at whatever small balance it holds.

• Interacting with new or unaudited dApps and smart contracts
• Minting NFTs from unverified collections
• Claiming airdrops from unfamiliar or unverified sources
• Testing bridges, swaps, or protocols before committing real funds

Good practice is to move any assets received back to a secure main wallet promptly, avoid reusing the same burner across multiple risky sites, and revoke old token approvals periodically using an on-chain approval checker. A burner wallet reduces exposure but is not a substitute for verifying a contract's legitimacy before signing.