A contract-signing notice lands in the inbox and says a marketplace transaction is waiting. One blue button promises to open the documents.
The request sounds procedural, especially during an active sale or project. Yet the message offers almost nothing that ties it to a real agreement.
Overview
The email creates a contract without identifying the transaction
The Marketplace Contract Signature email arrives with a subject such as “Contract Documents for Signature.”
It says the recipient has been sent a marketplace contract and must sign it to complete a pending transaction.
A large “View Document” button starts the supposed signing process. The message may include a document icon and restrained corporate formatting.
What it does not provide is more important: no recognizable marketplace, counterparty, order, listing, contract number, amount, or previous conversation.
The document route ends at a false login
The button leads to a site designed to imitate an email provider or online document service.
Some phishing kits change their visual theme after reading the target address, showing a familiar-looking login for the recipient’s provider.
The page then requests an email address and password before displaying the agreement.
There is no valid marketplace contract behind that requirement. The form exists to capture credentials from people trying to review the document.
The vague marketplace label lets the story fit many recipients
“Marketplace” can suggest property, freelance work, wholesale orders, product listings, advertising, procurement, or an online sale.
The sender leaves that interpretation open, allowing each reader to connect the message with their own current activity.
Warning signs include:
- No named marketplace or verified signing provider.
- No contract number, transaction reference, or counterparty.
- No earlier message describing the agreement.
- A sender domain unrelated to any known transaction.
- A View Document button with an outside destination.
- A page asking for the mailbox password.
- No matching contract inside the marketplace account.
What a Real Signature Request Should Explain
A legitimate agreement normally identifies the parties, document title, sender, signing platform, and reason the recipient is expected to act.
The surrounding business process should already exist. A quotation, negotiation, order, listing, or project discussion usually comes before a contract.
Known electronic-signature services send invitations from documented domains and provide support information that can be reached independently.
The recipient should be able to open the marketplace separately and find the same pending transaction or document.
Some platforms require an account login, but authentication occurs on the platform’s verified domain, not a generic page reached through an unknown sender.
An email password is especially sensitive. A document sender never needs to know that secret to prove who can view or sign an agreement.
How the Marketplace Contract Signature Scam Works
Step 1: The campaign reaches people who handle digital documents
Phishers send the invitation broadly or focus on business addresses associated with sales, management, purchasing, administration, and public contact pages.
Modern workplaces sign agreements online, so a contract notification does not immediately look unusual.
The subject avoids dramatic threats. It resembles a task that might wait among invoices, approvals, and shared files.
This low-key tone can bypass the skepticism triggered by prizes, refunds, or overt account warnings.
Step 2: A deliberately incomplete story encourages curiosity
The message says a marketplace contract requires signature but avoids naming the marketplace or transaction.
Recipients may wonder whether a colleague initiated it, a customer used a new platform, or an old negotiation has moved forward.
The absence of details becomes a reason to click rather than a reason to stop.
A genuine sender would have little reason to conceal the basic identity of an agreement from the intended signer.
Step 3: The View Document button hides the real destination
The label describes an action, not the website that will receive the visitor.
Email HTML allows the button to point toward an unrelated domain, redirect service, compromised site, or disposable phishing host.
A link can even contain trusted product names in its path or subdomain while belonging to a completely different registered domain.
Previewing the URL helps, but independent navigation to the claimed marketplace is safer than opening the suspicious destination.
Step 4: The landing page adapts to look familiar
The phishing page may show a document preview, signature status, lock icon, or familiar provider theme.
Some kits inspect the submitted email domain and choose a matching webmail design.
That adaptation is visual. It does not establish a connection to the real provider or signing platform.
The page’s objective is to make the password field feel like an ordinary authentication step before the recipient reconsiders the transaction.
Step 5: The password is captured before any contract appears
When the form is submitted, the entered credentials can be transmitted to the campaign operator.
The page may show a generic error, ask for another attempt, or redirect to an unrelated site.
A second attempt can reveal another password if the victim assumes the first entry was outdated.
The absence of a document afterward does not undo the submission. The mailbox credential should be treated as exposed immediately.
Step 6: A real mailbox makes the next contract trap stronger
Account access gives attackers existing threads, signatures, contacts, file-sharing notices, and information about active business relationships.
They can resend the same contract lure from the victim’s genuine address, where recipients are more likely to trust it.
Forwarding and inbox rules can hide responses or security warnings while the attacker watches conversations.
The campaign can expand from simple credential theft into invoice fraud, data theft, or impersonation inside a real transaction.
Sender, Transaction, Platform, and Login Verification Checks
The sender must belong to someone involved in the agreement
Expand the full From and Reply-To addresses. Compare them with the counterparty’s verified website, prior correspondence, and internal records.
A marketplace display name or contract icon can be copied without controlling any legitimate account.
If a familiar person appears as sender, contact them through an earlier thread, known telephone number, or separate workplace channel.
Do not reply to the questionable message and accept the response as verification. The same operator may answer.
The transaction should exist before the invitation
Search for the order, listing, proposal, purchase request, customer, property, or project supposedly connected to the contract.
Ask the responsible colleague whether a signature request was initiated and which platform they expected to use.
Open the marketplace through a bookmark or typed address. Check pending transactions, notifications, and document history there.
If no commercial relationship or authenticated record exists, the email has failed a basic reality check.
The signing platform must be identifiable
Legitimate invitations identify the service hosting the agreement and direct users to a domain controlled by that service.
Read the registered domain, not only the page title, logo, or security claims.
A site that has gone offline is not retroactively safe. Phishing hosts are often removed, abandoned, or replaced quickly.
Never search for a similarly named signing service and assume the email came from it. Verify the exact invitation through the counterparty.
The login request must stay inside the correct service
A document platform might authenticate an existing user, but it should never request the password to an unrelated mailbox.
Single sign-on can redirect to a genuine identity provider, whose exact domain should be familiar and independently verifiable.
Password managers provide a useful warning when stored credentials do not match the page’s domain.
When the form asks for an email password on an unknown site, close it and begin account recovery if anything was submitted.
Why an Offline Phishing Page Still Matters
The linked site observed during this campaign may later become unavailable. That is common in phishing investigations.
Hosting companies, security teams, browser vendors, and domain registrars regularly disable reported pages.
Campaign operators also rotate infrastructure when a domain becomes blocked or when a stolen hosting account is recovered.
An offline page does not make the email genuine. The sender, missing transaction, and deceptive destination remain evidence of the attempt.
Do not keep reopening the link to see whether it returns. A future version can redirect to new infrastructure.
Report the message with its original headers and URL even when the landing page no longer loads.
Damage After a Business Mailbox Is Compromised
A business inbox contains the context needed to turn broad phishing into targeted fraud.
Attackers can identify customers, suppliers, approval chains, payment schedules, contract negotiations, and cloud services from normal messages.
They may wait for a legitimate transaction, then insert altered bank instructions or a replacement document.
Compromised accounts can also send fake signature requests to contacts who recognize the real address.
Hidden rules can forward messages and suppress warning replies, giving the intruder time to maintain parallel conversations.
Signs requiring immediate review include:
- Unknown sign-ins or active sessions.
- Forwarding to an unfamiliar external address.
- Rules moving replies or alerts out of sight.
- Contract messages appearing in Sent without authorization.
- Unexpected password resets for connected services.
- Customers asking about documents you never issued.
- Changes to recovery details or delegated access.
How to Review a Signature Request Safely
Begin with the business event. Identify the person, transaction, document, and expected signing platform before touching the button.
Call the counterparty using a number already stored in company records. Ask them to confirm the invitation and document title.
Open the marketplace or signing platform independently. A real pending agreement should be visible inside the authenticated account.
Compare the exact destination domain with the platform’s official documentation and previous genuine invitations.
Read the access request. A contract viewer has no legitimate reason to collect an outside email password.
When any part fails, preserve the email for security and avoid forwarding the active link to other employees.
What to Do if You Have Fallen Victim to This Scam
- Close the false document page. Do not retry the login, approve prompts, download replacement viewers, or contact support details shown there.
- Change the submitted email password. Open the official provider independently from a clean device and create a completely new, unique credential.
- Revoke every session. Sign out webmail, mobile clients, desktop applications, remembered browsers, app passwords, and connected services you do not recognize.
- Audit mailbox persistence. Remove unfamiliar forwarding, inbox rules, delegates, recovery contacts, OAuth applications, POP access, and IMAP connections.
- Enable stronger authentication. Prefer passkeys, security keys, or authenticator codes. Reject every unexpected push request during recovery.
- Find reused passwords. Secure cloud storage, marketplace accounts, financial services, work platforms, and any other account sharing the exposed secret.
- Notify the organization promptly. Security and IT teams may need to preserve logs, revoke tokens, search related messages, and contact recipients.
- Review business activity. Finance and sales teams should inspect contract changes, payment instructions, new documents, and messages sent from the affected mailbox.
- Run Malwarebytes when device exposure is possible. Scan fully after downloads, browser extensions, notification permissions, or unexpected software behavior.
- Use AdGuard for another protective layer. Its filters can block many known phishing pages and malicious ad routes before they finish loading.
- Preserve and report evidence. Keep the original message, full headers, URL, screenshots, sign-in history, mailbox changes, and affected conversation records.
Is Your Device Infected? Run a Free Malware Scan
Slow performance, constant pop-ups, or strange behavior? These are classic signs of a malware infection. A quick way to check is to scan your device with Malwarebytes Free, one of the most trusted malware removal tools available. If you only visited a scam page and didn’t download or install anything, this scan is optional.
The free version detects and removes the most common threats, including:
- Adware — the cause of those annoying pop-ups
- Browser hijackers — unwanted redirects and changed homepages
- Trojans and spyware — hidden programs stealing your data
- Potentially unwanted programs (PUPs) — software you never asked for
👉 Select your device below — Windows, Mac, or Android — then follow the simple steps to download Malwarebytes, scan your system, and remove any threats it finds. The scan usually takes 5 to 20 minutes.
Run a Malware Scan with Malwarebytes for Windows
Malwarebytes is one of the most popular and trusted anti-malware tools for Windows — and it’s completely free for removing infections. It catches threats that many antivirus programs miss, including adware, browser hijackers, and trojans. Follow the steps below to scan your PC and remove what Malwarebytes finds.
Download Malwarebytes
Click the button below to download the latest version of Malwarebytes for Windows from the official source. The free version is all you need — it will scan your computer and remove adware, browser hijackers, and other malicious software at no cost.
Download MalwarebytesOfficial installer for Windows 11 and 10. Your download starts right away.Want real-time protection? See Malwarebytes Premium
Malwarebytes Free for WindowsScans and removes malware at no cost-
Install Malwarebytes
When the download finishes, open your Downloads folder and double-click the MBSetup file. If Windows shows a User Account Control pop-up, click “Yes” to allow the installation.
Follow the On-Screen Prompts to Install Malwarebytes
The setup wizard will walk you through a few quick screens:
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Choose where you’re installing the program — “Personal Computer” or “Work Computer” — then click Next.
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Malwarebytes will now install on your device. This usually takes under a minute.
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When installation is complete, the “Welcome to Malwarebytes” screen will open automatically.
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On the final screen, click Open Malwarebytes to launch the program.
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Optional: Check for rootkits with a Custom Scan
You don’t need to change any settings for a normal scan. The standard Threat Scan in the next step is enough for most problems, so you can go straight to it.
If you also want to check for rootkits, use a Custom Scan. In current versions of Malwarebytes, rootkit scanning is only available there:
- On the Scanner tile, click the three-dot menu and select Advanced Scan.
- Choose Custom Scan. In its options, check Scan for rootkits.
- Select your system drive (usually C:\) as the location to scan, then start the scan. It takes longer than a Threat Scan.
- When it finishes, review and quarantine the results as described in the steps below.
Rootkit scanning isn’t available on Windows devices with ARM processors.
Start the Scan
Click the blue Scan button. Malwarebytes will automatically update its virus database and start checking your computer for malware.
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Wait for the Scan to Finish
The scan checks your entire system for browser hijackers and other malicious programs, so it can take 5 to 20 minutes depending on your computer. Feel free to do something else — just check back occasionally to see the progress.
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Quarantine the Detected Threats
When the scan is done, you’ll see a list of everything Malwarebytes found — malware, adware, and potentially unwanted programs. Click the “Quarantine” button to remove all of them at once.
Malwarebytes will now remove the malicious files and registry entries and move them safely into quarantine.
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Restart Your Computer
Some threats can only be fully removed after a reboot. If Malwarebytes asks you to restart, click Yes. Once you’re logged back in, Malwarebytes has finished removing the threats it found.
When the scan is done, check whether the problems you noticed have stopped. If they continue, see the options below.
If you are still having problems with your computer after completing these instructions, then please follow one of the steps:
- Run a computer scan with ESET Online Scanner
- Ask for help in our Windows Malware Removal Help & Support forum.
Run a Malware Scan with Malwarebytes for Mac
Malwarebytes for Mac is a free on-demand scanner that removes the malware other security software tends to miss — adware, browser hijackers, and unwanted programs included. Cleaning an infected Mac with Malwarebytes has always been completely free, and it’s our go-to recommendation. Follow the steps below to scan your Mac and remove what Malwarebytes finds.
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Download Malwarebytes for Mac
Click the button below to download the latest version of Malwarebytes for Mac.
Download MalwarebytesOfficial installer for macOS. Your download starts right away.Want real-time protection? See Malwarebytes PremiumMalwarebytes Free for MacScans and removes malware at no cost -
Open the Malwarebytes setup file
When the download finishes, open your Downloads folder and double-click the setup file to begin the installation.
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Follow the On-Screen Prompts to Install Malwarebytes
The Malwarebytes for Mac Installer will guide you through a few quick screens. Click “Continue” and keep following the prompts until the installation completes.
When the installation is complete, Malwarebytes opens to the Welcome to Malwarebytes screen. Click “Get started“.
Malwarebytes needs Full Disk Access to check your whole Mac. When it asks, open System Settings > Privacy & Security > Full Disk Access, turn on Malwarebytes (it may be listed as Malwarebytes Protection), and confirm with your password or Touch ID. Then return to Malwarebytes. On macOS Monterey and earlier, this setting is in System Preferences > Security & Privacy > Privacy.
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Select “Personal Computer” or “Work Computer”
Malwarebytes will ask what type of computer you’re installing it on. Click either Personal Computer or Work Computer, whichever applies.
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Start the Scan
Click the “Scan” button. Malwarebytes will automatically update its detection database and begin checking your Mac for malware.
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Wait for the Scan to Finish
Malwarebytes will scan your Mac for adware, browser hijackers, and other malicious programs. This can take a few minutes, so feel free to do something else — just check back occasionally to see the progress.
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Quarantine the Detected Threats
When the scan is done, you’ll see a list of everything Malwarebytes found. Click the “Quarantine” button to remove all the threats at once.
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Restart Your Mac
Malwarebytes will now remove all the malicious files it found. Some threats can only be fully removed after a reboot — if Malwarebytes asks you to restart, allow it. Once you’re logged back in, check whether the problems you noticed have stopped. If they come back, save the scan report and ask for help in our forum.
If the problems you noticed continue after the scan, see the options below.
If you are still experiencing problems while trying to remove a malicious program from your computer, please ask for help in our Mac Malware Removal Help & Support forum.
Run a Malware Scan with Malwarebytes for Android
Malwarebytes for Android scans your phone or tablet for malware, adware, and potentially unwanted apps. The free version scans only when you start a scan. Real-time protection, which checks apps automatically, is part of the paid Premium version.
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Download Malwarebytes for Android.
You can download Malwarebytes for Android by clicking the link below.
Get Malwarebytes for AndroidOpens Google Play in a new tab.Want real-time protection? See Malwarebytes Premium for AndroidMalwarebytes for AndroidScans your phone and removes malware at no cost -
Install Malwarebytes for Android on your phone.
In the Google Play Store, tap “Install” to install Malwarebytes for Android on your device.
When the installation process has finished, tap “Open” to begin using Malwarebytes for Android. You can also open Malwarebytes by tapping on its icon in your phone menu or home screen.
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Follow the on-screen prompts to complete the setup process
When Malwarebytes opens, it walks you through a short setup. Tap Get started and follow the prompts. If you see an offer for a trial or a paid plan, read it before you accept. You can skip it and keep using the free scanner.
Malwarebytes will ask for permission to access the files on your phone so it can scan them. Tap Allow, or turn on the permission in the Android screen that opens, then return to Malwarebytes.
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Run a scan with Malwarebytes for Android
On the main screen, tap Scan now. In some versions, you open the menu, tap Scanner, and then tap Run a scan.
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Wait for the Malwarebytes scan to complete.
Malwarebytes will now start scanning your phone for adware and other malicious apps. This process can take a few minutes, so we suggest you do something else and periodically check on the status of the scan to see when it is finished.
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Remove the detected apps.
When the scan has been completed, you will see a list of the threats that Malwarebytes for Android has detected. Next to each detected item, tap the menu icon (three dots), then choose to uninstall the app or delete the file. Android then asks you to confirm. Tap OK or Uninstall to remove the app.
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Restart your phone.
When the detected apps are removed, restart your phone if Malwarebytes asks you to. Then check whether the problems you noticed have stopped.
If the problems you noticed continue after the scan, see the options below.
If you are still having problems with your phone after completing these instructions, then please follow one of the steps:
- Ask for help in our Mobile Malware Removal Help & Support forum.
- Only as a last resort, reset your phone to factory settings. Read the warning below first.
- Back up your photos, videos, files, and messages, for example to your Google account or a computer.
- Make sure you know your Google account email and password. The phone asks for them after the reset. If you changed the password recently, Google recommends waiting 24 hours before you reset.
- On a Samsung phone, also make sure you know your Samsung account password.
- If you use an authenticator app for two-step verification, move your accounts to another device or save your backup codes first.
Stay Protected: Block Ads and Malicious Sites
No scan can prove a device is completely clean, so it helps to block threats before they reach you. Most infections start with a malicious ad or a fake download button — so blocking them at the source is your best defense.
We recommend AdGuard, which blocks malicious ads, phishing pages, and dangerous redirects before they can reach you.
👉 Download AdGuard and browse safely
Controls That Reduce Document Phishing Risk
Organizations should standardize approved signing platforms and teach employees which exact domains those platforms use.
Payment and contract changes should require confirmation through a second channel, especially when a new sender or unfamiliar platform appears.
Mail systems can flag display-name impersonation, newly registered domains, suspicious redirects, and unusual login pages.
Phishing-resistant authentication reduces the value of stolen passwords, although sessions and connected applications still require monitoring.
Alert on new forwarding, delegates, inbox rules, and OAuth grants. Those changes often reveal persistence before direct financial damage becomes visible.
Make reporting simple and blame-free. Fast reports protect coworkers who may have received the same invitation.
Maintain a verified directory of counterparties and approved platforms, so employees can check a request without trusting contact details supplied inside the message.
Training should include quiet administrative lures, not only urgent threats. Vague agreements often appear credible precisely because their language feels routine.
Frequently Asked Questions
Is there a real marketplace contract behind this email?
The campaign provides no verifiable agreement. Check the marketplace and counterparty independently before accepting any contract claim.
Why does the page resemble my email provider?
Phishing kits can choose a visual theme from the target’s email domain. Familiar appearance does not connect the page to the provider.
What if the contract link no longer works?
Report the email anyway. Phishing infrastructure frequently disappears or rotates, and an offline destination does not make the invitation legitimate.
Can a real signing service ask me to log in?
Yes, but authentication should occur on the service’s verified domain or a genuine identity provider, never through an unrelated password form.
Is reading the email enough to compromise the account?
Normally no. The main risk begins after opening the link, submitting credentials, approving authentication, downloading files, or granting permissions.
Who should a workplace victim notify first?
Contact internal security or IT immediately, followed by the manager and relevant finance, legal, or privacy teams under the incident plan.
The Bottom Line
The Marketplace Contract Signature scam uses an unnamed transaction and a professional document prompt to move recipients onto a counterfeit email login.
Confirm the agreement outside the message. If a password was entered, secure the mailbox completely and investigate every contract message sent afterward.
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