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First, stop and identify what happened
- Close the page. Do not reconnect, send funds, sign another message, or approve a transaction to investigate. Do not use links or support contacts supplied by the suspicious site.
- Check the interaction in your wallet. Determine whether you connected only, signed a message or transaction, approved token access, disclosed a recovery phrase or private key, or sent crypto. A wallet connection is not proof that funds were stolen, but it also does not tell you whether you previously granted an approval.
- Check for activity. Review the wallet’s recent activity on the relevant network for transactions you do not recognize. Save the website domain, wallet addresses, transaction hashes, messages, and timestamps for reporting. Never publish or send anyone your recovery phrase or private key.
MetaMask explains that connecting a wallet to a dapp lets it view wallet information and suggest transactions; moving assets requires a signature. A token approval is a separate authorization that can let a smart contract move a particular type of token, sometimes with a broad or unlimited allowance. Other wallets may use different labels or settings. See MetaMask’s dapp guide and token approval guidance.
If you only connected your wallet
Disconnect the site through your wallet’s connection settings. In MetaMask, use the wallet’s connected-sites or dapp-connection controls; other wallets may name this setting differently. This limits the active connection, but it is not the same as cancelling an on-chain token approval. MetaMask states: “Note that disconnecting your wallet from a dapp does not affect token approvals.”
If you did not sign anything, approve token access, or disclose a secret, a connection by itself generally allows the site to see wallet information and request actions—not move assets. Do not sign a new transaction simply because a site or message claims it is needed to disconnect or secure the wallet.
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If you signed a transaction or approved token access
Check allowances for the relevant token and network, then revoke any approval you do not recognize or no longer want. Use the wallet’s own portfolio or approval-management feature, or a trusted block explorer for that chain. Do not follow an approval-management link embedded in the suspicious presale site. MetaMask’s allowance revocation guide explains its process.
Revoking is a separate on-chain transaction, not a setting change: it can require network gas, and the wallet will ask you to sign it. Confirm that the network and approval details are correct before proceeding. If you cannot confidently identify the allowance or network, seek help through the wallet provider’s independently verified support channel rather than signing an unfamiliar transaction.
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A signed message is not automatically a token approval or funds transfer. Its effects depend on what was signed and how the contract or service uses it. Review the wallet’s activity and the transaction or signature details; do not assume that disconnecting undoes a signature or an on-chain action.
If you disclosed a recovery phrase or private key
Treat the wallet as compromised. Anyone who has the recovery phrase or private key may be able to control the associated assets, even if you disconnect the site or change a password. Using a clean, trusted device if possible, move remaining assets to a new wallet controlled by a new recovery phrase, then stop using the compromised wallet and accounts tied to that phrase. Never enter the old phrase into another website or share it with someone offering help.
MetaMask’s guidance for a compromised Secret Recovery Phrase is to move funds where possible and discontinue use of the old wallet. Confirmed blockchain transactions are generally not reversible by a wallet provider, so no service should promise that it can simply undo a transfer.
If crypto has already been sent or unauthorized activity appears
Contact the exchange, payment service, or ATM operator used to send the funds as soon as possible and ask whether it can help. Save evidence for reports, including transaction hashes and communications, but keep wallet secrets private. Reporting may help authorities and providers investigate; it does not guarantee that funds will be recovered.
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In the United States, the FTC lists these reporting channels:
- FTC: ReportFraud.ftc.gov
- CFTC complaint portal
- SEC Tips, Complaints, and Referrals (TCR)
- FBI Internet Crime Complaint Center (IC3)
- The cryptocurrency exchange company used to send the money
These channels are U.S.-specific. Elsewhere, contact the relevant national consumer-protection authority, financial regulator, and cybercrime agency. See the FTC’s cryptocurrency guidance for its U.S. recommendations.
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Watch for recovery scams
People who have lost crypto are often targeted again by someone claiming they can retrieve it. The FTC warns that recovery scammers may demand an upfront retainer or processing fee, request financial information, or contact victims unsolicited. Do not pay an unsolicited recovery offer or give the person account details. Independently verify contact information before communicating with any agency or service.
How to assess a suspicious presale
A warning sign is not, by itself, proof that a particular presale is fraudulent. The FTC identifies promises of large or fast returns with little risk and pressure to act quickly as common investment-scam signals. It advises researching independently and verifying claims rather than relying only on promotional statements, testimonials, reviews, or blogs. Apply the same caution to a crypto presale:
- Check whether the project’s identity, domain, team claims, and key statements can be independently verified.
- Look for clear, documented risks rather than relying on promises of guaranteed returns.
- Do not let urgency or reluctance to allow time for research rush you into connecting, signing, approving, or sending funds.
- Treat a polished website, online discussion, or wallet security badge as information—not proof that an offering is safe. A missing badge alone does not prove danger either.
The FTC’s investment-scam guidance explains these warning signs. No finding here establishes whether any individual presale or contract is legitimate; that requires case-specific verification.
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