Essay

Why fraud models should only propose. By Amir Shachar.

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Riskernel

Product catalog

One kernel, many risk problems.

Riskernel is a fraud scoring API (47 ms median, Riskernel-reported; single calls vary). The same scoring, rules and AI-agent tooling also power a set of fixed-scope assessments for banks, credit unions, lenders, insurers, payment companies and fintechs. Each one is designed and run by Riskernel.

These are engagements delivered by Riskernel, not shipped software. Scope and fees are agreed on a short intro call.

Prove your AI agents and models are safe

For banks, insurers and fintechs putting AI into claims, onboarding, servicing, fraud and AML work, and for the model-risk teams that must sign off on it.

AI Agent Incident Tabletop

3-hour session or on-site half day

An AI agent fails overnight, for example an onboarding agent passing hundreds of synthetic identities, and nobody has rehearsed who decides what when the regulator and the press call.

You get a facilitated exercise for your executive and risk team on public and synthetic data, a scored after-action report and a written record of decision rights.

Agent Blast Radius Statement

1 to 3 weeks, set by how many tools the agent holds

Nobody can say, in money terms, how much damage a production AI agent could do if it were fully hijacked.

You get a signed, independent statement of the worst-case loss, built on deterministic checks of the agent's tool scopes, limits and approval steps, with the assumptions that bound it written out. The fix is not sold in the same engagement, so the number stays independent.

Held-Out Model Validation Exam

Agreed on a short call, set by the model and the use case

Your bank's model-risk team must validate an LLM before go-live, and the public benchmarks it was scored on may already sit in its training data.

You get held-out test packs (fresh cases the model has never seen) generated from templates, with the right answer computed by code wherever it can be calculated, plus trick cases that look for blind spots and exploitable edges, a written test method signed by its author, and, for lenders whose models serve several partner institutions, a per-partner evidence pack.

AI Investigator Proving Ground

Agreed on a short call, set by the agent and the case types

You want AI agents to work fraud and AML alerts, but you have no case file where the right answer is known in advance.

You get a synthetic back office (customers, transactions, alerts, KYC files, disputes) with planted fraud rings and mule networks and a hidden answer key, and a scored run of your investigator agent against it.

Impersonation, deepfakes and social engineering

For fintech, payments and finance teams whose people, and whose AI agents, can be talked into moving money. Every drill runs only with written consent.

Scam-Script Test for AI Chat and Voice Agents

3 to 4 weeks

Scammers will try to talk your customer-facing AI agent into resetting access, changing details or moving money.

You get about 400 scripted con attempts in total, run with your written consent against your chat agent, your voice agent or both, a signed report with fixes, and a retest.

Deepfake Executive Drill

3 to 4 weeks

A fake CEO built from public video and audio asks finance, treasury or payroll to pay, or to change bank details.

You get a test, run with written consent from the company and the executive, of whether staff act on that fake, and a board report with a ranked fix plan.

Vendor Bank-Change Drill

2 to 3 weeks

Payment-redirect fraud works when accounts payable changes a vendor's bank details without calling the number on file and getting a second approval.

You get a consented, harmless drill of fake bank-change emails, texts and calls, and a dated evidence letter built to answer cyber-insurance questions.

Payments, scams and platform abuse

For banks fighting authorised push payment scams, for acquirers and PSPs that do not want to process scam money, and for usage-priced platforms losing revenue to abuse.

Scam Warning Lab

3 weeks

Your scam warning screens exist, but you do not know whether they stop a customer who is mid-scam.

You get a lab where a scripted scammer plays against a copy of your real warning screens, a report on which warnings hold and which fail, and an optional pilot of a short explainer in the message you already send to suspected money mules.

Scam-Merchant Trace

2 to 3 weeks

Deepfake celebrity ads for fake supplements and crypto get paid through merchant accounts that looked clean at onboarding.

You get a one-off sweep that traces live scam ads to the merchants processing them, with the statement descriptor, checkout domain, acquirer where visible, ad IDs, a funnel recording and the receipt for each finding.

Payout Fraud Audit

2 to 3 weeks

Platforms that pay out to thousands of payees lose money to fake and duplicate payee accounts, takeovers that change where payouts go, and mule payees who cash out fast.

You get a review of how a fraudster could open, take over or rent payee accounts on your platform and move money out through your payout rails, with the weak points ranked by exposure and plain fixes for each.

Signup and Credit Abuse Audit

Fixed scope; the length is agreed on a short call and set by the log period you share

Free-credit farming, multi-accounting, key resale and metering gaps quietly drain usage-priced AI and API platforms.

You get a fixed-scope forensic audit of your signup, payment and usage logs that sizes the loss and hands over blocking rules.

Detection Rules Proving Ground

Agreed on a short call, set by the rule set and the schemes in scope

Your transaction monitoring and card fraud rules raise alerts every day, but nobody can say how many launderers, mules and fraudsters they let through.

You get a synthetic set of customers and transactions with planted laundering, mule and card-fraud cases and a hidden answer key, run through your own rules and thresholds, and a scored report of what they caught, what they missed and how many false alerts they raised.

Lending and collateral fraud

For factoring companies, asset-based lenders and private-credit funds whose collateral is only as real as the invoices behind it.

Pre-Funding Invoice Check

A pilot on one batch; size agreed on a short call

Double-pledged invoices and redirected bank details are found after the advance has already gone out.

You get a pilot on a batch of invoices: each one confirmed with the debtor's real payment approver as existing, undisputed and payable to your account, with double-pledge and bank-detail redirect flags.

Collateral Book Exam

First exam on a fixed scope; monthly afterwards if you choose

Field exams sample a handful of invoices, and fraud hides in the rest of the book.

You get a first exam of every invoice behind a loan book, checked against lien filings, trade records and your bank statements, with a signed flags report for the credit committee. It can continue monthly if you want it to.

Fraud vendors and third-party AI

For fintechs and banks that depend on one outside fraud vendor, and for vendors whose AI feature has to pass a bank's or insurer's review.

Fraud Vendor Exit Plan

A scan first, then an optional build; timeline agreed on a short call

Your fraud defense depends on one outside AI vendor, and you have never tested what happens if it goes away.

You get an exit-readiness scan, then, if you choose, a backup fraud model built inside your own cloud and tested on held-out data, with an exit-test report signed by Amir Shachar.

AI Feature Attack Test for Bank Review

Testing window agreed on a short call after written permission

A bank or insurer reviewing your AI feature wants proof it resists prompt injection and data leakage, and written answers stall the deal.

You get a dated attack test of your live AI feature, run with written permission, covering prompt injection, data leakage and retention, and an answer pack that cites only what was observed.

Don’t see your risk?

Tell us what keeps you up at night and we’ll scope a tailored assessment around it.