Fraud detection for small business.

Check vendors, invoices, emails, and transactions before every payment.

Past Analyses
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Vendor / Supplier Check
Checks for phantom vendors, fake registrations, impersonation, and known fraud patterns. For suspicious emails use the Email tab. For invoices use Invoice. For wire requests use Transaction.
New here? Load a demo to see PaySentinel in action.
Runs entirely in your browser — routing-number math, common typosquat domains, structuring amounts, and urgency language. Narrower than the full check above; it won't catch everything.
What happens to what I enter? ▾
Full check (above): everything you type into this form is sent to Claude, an AI model made by Anthropic, to generate the risk analysis. We don't store your submitted details once your session ends.

What we do keep: your IP address is used server-side to enforce the 10-checks-per-week free limit, and is automatically deleted after about 8 days. No account or personal identity is required.

Full detail in our Privacy Policy.
Running vendor check...
Business registration
Web presence
Fraud pattern scan
Risk scoring
Vendor Memory Alert
Invoice Analyzer
Checks for fake vendors, manipulated payment instructions, redirect fraud, and phantom invoice patterns. For suspicious emails use Email tab. For wire requests use Transaction.
Upload Invoice PDF
Click to browse or drag and drop your PDF invoice here
or enter details manually
New here? Load a demo to see PaySentinel in action.
Runs entirely in your browser — routing-number math, common typosquat domains, structuring amounts, and urgency language. Narrower than the full check above; it won't catch everything.
What happens to what I enter? ▾
Full check (above): everything you type into this form is sent to Claude, an AI model made by Anthropic, to generate the risk analysis. We don't store your submitted details once your session ends.

What we do keep: your IP address is used server-side to enforce the 10-checks-per-week free limit, and is automatically deleted after about 8 days. No account or personal identity is required.

Full detail in our Privacy Policy.
Running invoice check...
Invoice structure
Payment instructions
Redirect fraud signals
Risk scoring
Vendor Memory Alert
Email / Sender Check
Checks for typosquat domains, spoofing, CEO fraud, and phishing signals. To vet a vendor use Vendor tab. For suspicious invoices use Invoice. For wire requests use Transaction.
Why add the link? Phishing emails often use legitimate-looking senders but link to fake sites. Paste the URL here without clicking it — right-click the link and select "Copy link address."
New here? Load a demo to see PaySentinel in action.
Runs entirely in your browser — routing-number math, common typosquat domains, structuring amounts, and urgency language. Narrower than the full check above; it won't catch everything.
What happens to what I enter? ▾
Full check (above): everything you type into this form is sent to Claude, an AI model made by Anthropic, to generate the risk analysis. We don't store your submitted details once your session ends.

What we do keep: your IP address is used server-side to enforce the 10-checks-per-week free limit, and is automatically deleted after about 8 days. No account or personal identity is required.

Full detail in our Privacy Policy.
Running email check...
Domain legitimacy
Spoofing patterns
Social engineering
Risk scoring
Transaction / Payment Check
Checks for CEO fraud, wire scams, overpayment schemes, structuring, and payment fraud patterns. For invoice-based payment requests use Invoice tab.
New here? Load a demo to see PaySentinel in action.
Runs entirely in your browser — routing-number math, common typosquat domains, structuring amounts, and urgency language. Narrower than the full check above; it won't catch everything.
What happens to what I enter? ▾
Full check (above): everything you type into this form is sent to Claude, an AI model made by Anthropic, to generate the risk analysis. We don't store your submitted details once your session ends.

What we do keep: your IP address is used server-side to enforce the 10-checks-per-week free limit, and is automatically deleted after about 8 days. No account or personal identity is required.

Full detail in our Privacy Policy.
Running payment check...
Payment method
Amount & structuring
Recipient signals
Risk scoring
Vendor Memory Alert
Investigation Queue
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PaySentinel analysis is based on the information you provide, plus a live routing-number registry lookup — it does not verify vendor identity, business registration, or other claims against external records.
Results are for informational purposes only and are not a substitute for professional fraud investigation, legal advice, or law enforcement reporting.
Always verify findings independently. If you believe you are a victim of fraud, contact your bank and local law enforcement immediately.