Do not open an unfamiliar AI or crypto link just because it carries a familiar logo, appears in an advertisement, or ranks first in search. The safer method is to pause, inspect the complete hostname, find the service’s official domain through a trusted channel, and stop before entering credentials, downloading anything, or connecting a wallet if the address or request is uncertain.
This guide explains how to make that decision before a page loads, what registration records can—and cannot—tell you, why crypto wallet prompts require a higher standard, and what to do if you already clicked.
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What a “safe” domain check can—and cannot—prove
There is no single lookup, browser padlock, reputation score, search result, or attractive page design that certifies a domain. A site can use a convincing logo, copy a real service, appear in a sponsored result, or redirect visitors through a compromised website. The FBI has warned that malicious advertising and compromised legitimate sites can route people through redirection systems, with the final destination varying by visitor.
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Use a domain check as a decision process rather than a pass/fail test. The consequence of the requested action matters as much as the address:
- Viewing a page without entering information is lower risk than signing in, but an unexpected page can still lead to a download or deceptive prompt.
- Entering a password, payment detail, API key, or other sensitive information gives an attacker something to use even if the page looked professional.
- Connecting a cryptocurrency wallet or approving a transaction can expose assets immediately. A cloned project site may present a drainer contract or a fake mint.
When evidence conflicts or remains incomplete, close the tab. Uncertainty is a reason not to proceed, not a reason to test the site with a real account or wallet.
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The pre-opening workflow
1. Pause at the source of the link
Start with how the address reached you. Unexpected account warnings, urgent payment notices, surprise rewards, unsolicited direct messages, text messages, emails, and advertisements deserve suspicion. The Federal Trade Commission advises contacting a company through a website address or phone number you already know is genuine instead of using the link in the message.
Do not click merely to discover where a link goes. If the message claims that an account needs attention, open the organization’s known app or type a previously verified address yourself. For a promotion, find the project or service through an established channel that you already trust. Urgency is a social-engineering device, not proof of an opportunity.
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On a computer, copy the link or use the browser’s link-preview function without selecting it. On a phone, press and hold to copy or preview the address rather than following it. Expand shortened links when the service offers a safe preview. You need the full hostname, not the text displayed in a message.
Look for misspellings, omitted or added characters, unusual punctuation, and a brand name that appears only in a subdomain or in the path. A familiar word anywhere in a URL proves nothing. The FBI specifically warns that malicious addresses can resemble legitimate ones or use a subdomain associated with a legitimate-looking name.
3. Read the hostname from right to left
The registered domain is the important ownership boundary. Read the hostname from the right, identify the top-level domain, and then identify the label immediately to its left. Everything farther left is a subdomain controlled by that registered domain.
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For example, in login.ai-project.example.attacker.tld, the registered domain is attacker.tld; login, ai-project, and example are subdomains. The presence of a company or project name in those left-hand labels does not make the address belong to that company. Likewise, a path such as /official-login is content after the host and cannot establish ownership.
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Compare the address with the one you independently know to be official, character by character. Treat an unfamiliar spelling, an extra hyphen, a substituted letter, an unnecessary number, or an unexpected top-level domain as a stop signal until verified through another channel.
4. Locate the official domain independently
Use a trusted bookmark, an official application already installed on your device, or a phone number and website address saved before the message arrived. Do not rely on the first search result or a sponsored placement alone. The FBI has documented search-engine-optimization poisoning and fraudulent advertisements that imitate legitimate links.
Check more than one independent official channel when the stakes are high. For a crypto project, compare the domain announced by the project’s established account with the address shown in another official channel. A social post that appears only in the message that sent you the link is not independent confirmation.
Do not treat a successful login screen as confirmation. Attackers can reproduce the appearance of a real service and collect credentials before sending you onward. Authentication should occur only after the domain itself has been verified.
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5. Watch for redirects and unexpected destinations
A link may pass through several addresses before a page appears. A familiar first host does not prove that the final host is safe. The FBI describes redirection systems on malicious advertisements and compromised legitimate websites, including systems that vary the destination by visitor.
Stop if the address changes to an unrelated domain, repeatedly bounces between domains, opens a new tab unexpectedly, or asks you to disable browser protections. Do not “follow the chain” to see where it ends. Close the tab and begin again from an independently verified official address.
6. Match the requested action to the evidence
Before doing anything on the page, name the exact action it requests. A low-consequence page view does not justify a high-consequence response. Use this decision table:
| Requested action | What could be at stake | Default decision when the domain is not independently verified |
|---|---|---|
| Read a page | Further redirects, deceptive prompts, or a download | Close the page and verify the address first |
| Sign in or submit a password | Account takeover and reuse of stolen credentials | Do not enter information; open the known service directly |
| Enter payment or financial details | Unauthorized charges or financial-account compromise | Stop and contact the organization through a known channel |
| Download software or an extension | Malware or unwanted changes to the device | Do not download from the unfamiliar link |
| Connect a crypto wallet | Exposure to malicious approvals or asset-draining contracts | Reject the prompt and verify the project and domain independently |
| Sign a blockchain transaction | Irreversible transfer or authorization of assets | Do not sign unless the exact transaction and verified site are expected |
When you cannot explain why the action is needed and why this exact domain is authorized to request it, stop.
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ICANN Lookup and the Registration Data Access Protocol (RDAP) can add context about a domain’s registration. RDAP is ICANN’s current protocol for accessing registration data and was designed as the eventual replacement for WHOIS. A record may show dates, registrar information, nameservers, or a privacy service.
That information answers a narrow question: what registration data is currently available for this domain? It does not authenticate the operator, inspect the site’s code, verify its links, or prove that a page is free of phishing or malware. ICANN states that it is not responsible for verifying the user details in an RDAP profile.
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- A newly registered domain can be malicious, but an older domain can also be compromised or abused.
- A privacy-protected or sparse record does not by itself prove fraud; many legitimate registrants limit public details.
- A complete-looking record does not prove that the current page, redirect, or wallet contract is trustworthy.
Use registration data as one clue after you have inspected the hostname and sought independent confirmation. If the record conflicts with the service’s known history, treat that discrepancy as a reason to investigate further, not as permission to proceed.
Extra checks for AI-service domains
AI domains are not governed by a special safety test in the guidance cited here. Apply the same hostname and source checks used for any unfamiliar service, then focus on what the page asks you to provide. A page claiming to offer an AI assistant may request a login, payment information, an API key, a file upload, or a software download. None of those requests should be made until the domain has been confirmed through an official app, bookmark, or known contact path.
Be especially careful when a message says that an account, model, subscription, or usage limit requires immediate action. Open the service independently and check for the notice inside the authenticated account rather than using the message’s button. If the independently opened service does not show the same request, treat the message as fraudulent.
Extra checks for crypto and NFT domains
Wallet-related pages require the strictest standard because a connection or signature can have financial consequences that cannot be reversed. In an August 4, 2023 public service announcement, the FBI’s Internet Crime Complaint Center warned: “When accessing websites that request you connect your cryptocurrency wallet, look to see if the website is real and not a clone of the legitimate website.”
Verify the project before the wallet prompt
Find the project’s real website and established account through independent official channels. Compare the exact hostname, including every character and the top-level domain. Do not accept a cloned account, a surprise mint announcement, or an unsolicited reward as confirmation. The FBI has described spoofed NFT project accounts and sites designed to persuade users to connect wallets to drainer contracts.
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Use the URL warning signs named by the FBI
- A misspelled web domain.
- Additional or unnecessary characters in the URL.
- A link that does not work as expected or reroutes to a different page.
- An urgent, unexpected, or “limited supply” offer that you did not seek out.
The absence of these signs is not proof of safety. A polished clone can use a different tactic, so independent confirmation remains necessary.
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Read what the wallet is asking you to approve. A request to connect is different from a request to sign a message or authorize a token transfer, but each should be expected and understandable. Reject a prompt you did not initiate, a request that appears after an unexpected redirect, or a transaction whose recipient, amount, or permissions you cannot explain. Never provide a seed phrase or private key to a website; a legitimate site does not need it to connect a wallet.
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| Signal | Why it matters | Response |
|---|---|---|
| The link arrived unexpectedly or demands immediate action | Phishing commonly uses urgency and a message that appears to come from a familiar organization | Ignore the link and contact the organization through a known channel |
| The brand appears only in a subdomain or path | The registered domain may belong to someone else | Read the hostname right to left and compare the registered domain with an independently verified address |
| The page came from an advertisement or top search result | Fraudulent ads and search manipulation can imitate legitimate destinations | Open a saved bookmark, official app, or known address instead |
| The site redirects or the destination changes | Redirection systems can conceal or vary the final destination | Close the tab and do not continue through the chain |
| Registration data is private, sparse, or new | Registration records do not verify content or operator identity | Use the record only as context; require independent confirmation |
| A crypto site requests a wallet connection after a surprise offer | Cloned projects and drainer contracts target wallet approvals | Reject the prompt and verify the project’s real account and domain |
If you already clicked the link
Clicking is not the same as surrendering credentials or approving a transaction. Take proportionate action based on what happened.
- If you only viewed the page: close the tab and do not download files, install extensions, enter information, or connect a wallet.
- If a download started: do not open the file. Use your device’s normal security controls to remove it, update security software, and run a scan. FTC guidance specifically recommends updating security software and scanning after a suspicious click.
- If you entered a password: change it through the real service’s independently opened website. Change any other account that reused the same password, and review account activity for unauthorized access.
- If you shared payment or financial information: use the affected provider’s account-recovery and fraud procedures and monitor the account for unauthorized activity.
- If you connected a wallet or signed a transaction: stop interacting with the suspicious site. Use the wallet and project’s established security guidance to review approvals and transactions; do not approve another prompt offered as a “fix.”
- If you received the link by email or text: report it rather than replying. FTC guidance directs people to ReportFraud.ftc.gov, to forward suspicious texts to SPAM (7726), and to forward phishing emails to the Anti-Phishing Working Group.
Keep records of the message, full URL, timestamps, and transactions when reporting. Do not preserve a dangerous page by reopening it just to capture a screenshot; a copied address and the original message are usually enough for a report.
Strengthen accounts after the check
Domain verification and account protection solve different problems. Use multifactor authentication on important accounts. FTC guidance lists a security key as one possible factor and explains that MFA makes it harder for a scammer to use a stolen username and password. MFA cannot make a malicious domain legitimate, so enable it through the real service’s settings—not through a link whose authenticity you have not established.
Keep operating-system and security software updates current, and maintain a recovery method you control. These measures reduce damage if a suspicious page is opened, but they do not replace inspecting the hostname and independently confirming the service.
A compact rule to remember
Source, hostname, destination, and action must all make sense before you proceed. Verify where the link came from, read the registered domain rather than the visible brand, check that redirects end where expected, and match the requested action to the evidence. For passwords, payments, downloads, and especially wallet connections, an unresolved doubt is the decision to stop.
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