Before sending money to a crypto presale, independently confirm who is offering it, match the exact network and contract address, inspect what the contracts let administrators do, and get the token-delivery, refund, resale, and withdrawal terms in writing. A matching address, published code, or audit is evidence to examine—not proof that the offer is safe or that you will be able to get your money out.
Start by identifying the offer and the people behind it
Find the issuer or promoter, the official domain, the sale documents, the stated use of proceeds, and an explanation of what rights or utility the token is supposed to provide. Check contact and legal details, and compare information across more than one credible source reached independently. Do not rely on a link in an unsolicited message or on the presale site alone: look for misspelled or cloned domains, inconsistent project details, and payment instructions that change.
The SEC’s Investor Bulletin: Initial Coin Offerings (July 25, 2017) recommends understanding the business plan and token rights and warns that an impressive-looking token offering may still be fraudulent. Its ICO terminology reflects its 2017 context; the underlying due-diligence questions are still useful, but the bulletin does not establish that any particular current presale is legitimate.
If a U.S. securities offering or securities-related intermediary may be involved, check the relevant firm or person in the appropriate regulator’s register. The SEC’s guidance on crypto assets, updated or reviewed April 29, 2026, discusses how federal securities-law analysis depends on the facts. Do not assume that every token offering is—or is not—a securities offering based solely on its marketing.
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Match the exact chain and contract address
A token name or ticker is not a unique identifier. Different contracts can use the same name and symbol, and a wallet display or social post can make an unrelated token appear connected to a project. Ethereum.org’s guidance on identifying scam tokens describes copied identities and deceptive transfer indicators. Verify the full address, not just the first and last few characters.
- Get the claimed network and full address. Find the chain or network and token contract address in project documentation you reached independently. Record the sale-contract and claim-contract addresses too, if the documents identify them.
- Open the appropriate block explorer yourself. Use an explorer for the stated network, then compare the full contract address character-for-character with the independently obtained project information. A correct name, logo, ticker, or search result is not a substitute for an address match.
- Check the on-chain record against the documents. Review deployment details, transactions, holders, transfers, and whether the sale and claim contracts match the addresses the project publishes. Treat these as clues, not endorsements: malicious contracts can imitate names and symbols, and apparent transfer events can be misleading.
If the project does not state the network or contract address clearly, or if the independently found address conflicts with the one you are asked to use, pause. Do not fill the gap by trusting a wallet’s display name or a presale page’s claim.
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Understand what published code and an audit actually establish
Verified source code
On a block explorer, source verification generally means that submitted source and compiler settings correspond to deployed bytecode. It helps a reviewer inspect the deployed contract; it does not prove the code is correct, honest, or safe. Ethereum.org’s Verifying smart contracts guidance notes that comments and variable names can mislead and that partial verification may leave parts of a contract unclear. Treat a “verified” label as an inspection starting point, not a safety rating.
Audits
An audit is a review with a particular scope, not a guarantee. Check which exact contract, version, and network the report covers; when it was issued; what issues it identifies; and whether fixes were retested. A review of one token contract does not, by itself, establish the safety of a sale contract, the honesty or solvency of operators, the availability of a trading market, or your ability to withdraw.
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Administrative powers
Where you or an independent reviewer can interpret the code, identify who can mint tokens, pause transfers, blacklist addresses, change fees or sale settings, withdraw funds or tokens, or upgrade the contract and replace its implementation. These are control questions to check for, not a claim that every token has each power. If you cannot establish what an explorer’s verification badge covers or what important permissions mean, do not treat the badge as proof of safety.
Ethereum.org distinguishes reading existing contract data from writing to a contract. A read does not change chain state; a write does and requires a signed transaction. Do not sign a transaction merely to “check” a presale if you cannot understand what it will do. An unclear prompt or unexplained approval is a reason to stop and seek qualified help.
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Read the sale, claim, refund, and resale terms before paying
Do not treat “withdrawal” as one universal right. A presale might involve a refund from the seller, a claim transaction to receive tokens, a transfer out of a wallet, or a later sale on a market. These are different actions, with different conditions. The SEC’s 2017 ICO bulletin specifically recommends investigating how and when money can be returned and whether tokens can be resold.
- What are you buying? Record the exact token and quantity the payment is said to entitle you to, and the rights or utility the offering represents.
- When and how are tokens delivered? Look for the claim date and method, any vesting or unlock schedule, lockup, minimum claim, or separate claim transaction.
- Can you cancel or get a refund? Find who is responsible for a refund, who qualifies, the deadline, the process, and any conditions. If the terms do not say, do not assume a refund is available.
- Can you transfer or resell tokens? Check when transfers are permitted and whether wallet, geographic, exchange, or whitelist restrictions apply.
- Who controls funds and sale settings? Identify the contract receiving funds and any administrator’s ability to withdraw funds or change relevant parameters.
- What payment network, currency, and fees apply? Check which network and currency the sale accepts, what fees apply, and who receives them. Establish whether any further payment is required to claim or withdraw.
- Is there a real market to exit through? If trading or liquidity is claimed, identify the actual venue or pool and evidence of available depth. Thin or absent liquidity can make it difficult to sell; liquidity alone does not show that the issuer is honest.
Keep dated copies of the offer and terms, contract addresses, transaction hashes, and communications. A balance shown on a website is not the same as an on-chain withdrawal. The SEC’s May 29, 2024 crypto-scam alert describes cases where an initial small withdrawal builds trust before later withdrawals are blocked; a small successful withdrawal is not proof that larger ones will work.
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Use the same evidence checklist when comparing presales
Compare like with like. Record what each offer actually documents rather than filling gaps with assumptions. This framework brings together due-diligence questions in SEC guidance and contract checks described by Ethereum.org; it is not a regulator-approved score or an investment recommendation.
| Check | What to record |
|---|---|
| Identity | Issuer, independently corroborated domain, network, and full token and sale-contract addresses. |
| Transparency | Published source, what the explorer says is verified, and the audit report’s firm, date, covered contracts, version, findings, and retests. |
| Control | Administrator or owner roles, upgradeability, minting, pause, blacklist and fee powers, and authority to withdraw funds. |
| Sale terms | Token quantity and allocation, price or round changes, vesting, lockups, and claim timing. |
| Exit rights | Refund process and deadline, transfer or resale limits, withdrawal conditions, and stated fees. |
| Market exit | Whether trading is actually available, the named venue or pool, and evidence and limitations of liquidity. |
| Legal and geographic details | Issuer identity, stated eligible jurisdictions, offering disclosures, and relevant regulator checks where applicable. |
When a claim is missing, contradictory, or not independently confirmable, mark it as unknown and pause rather than treating the gap as favorable evidence.
Know which warning signs mean stop
- Guaranteed high returns, urgency, fear of missing out, unsolicited pitches, or pressure to act before you can review the terms.
- Unexplained gains displayed in an account, fake testimonials, or payment instructions that change or direct funds to a personal wallet.
- Conflicting contract addresses, unclear control of sale funds, or terms that change after you have relied on them.
- A new demand for a fee or tax before you can withdraw apparent profits or release funds.
The SEC identifies guaranteed-return claims, unsolicited offers, urgency, and misleading presentations as warning signs. Its May 29, 2024 alert also describes crypto investment scams in which a victim is told, often only when trying to withdraw, to pay an additional fee or tax. Do not send extra money just because a site calls it a release charge, tax, or verification fee. Contact the relevant exchange or wallet provider through independently found channels, preserve the evidence, and consider contacting the appropriate financial regulator or law-enforcement agency. Recovery is not assured, and a further payment can increase the loss.
No single favorable signal settles the decision. A polished website, apparent transfers, social proof, a published audit, or claimed liquidity each has limits. Ethereum.org describes ways tokens can imitate identities or transfers, while the CFTC presents liquidity as a risk consideration, not a guarantee. If the available evidence does not answer a material question, the practical response is to wait rather than infer safety.
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