ACI Worldwide

More than 10,000 signals, over 8,000 AI features and 500 behavioral attributes feed patented machine learning models that make the fraud decision. Those engineered features exist for the models to consume and would sit idle without them.

Business users run AI and expert rules capabilities themselves, with customizable fraud strategies and a global analyst team helping build real time risk strategies. Default thresholds are unpublished, and how a user's rules interact with the model underneath is not described.

A 13 month study on data from three retail customers found conventionally trained models degrading after three months while incremental ones held, stating population, duration and comparator, and a patent places the method on record. The study dates from 2020, and the product page's detection above 85 percent and three to one false positive ratio come with no current validation report.

Aegean Airlines denies 97 percent of confirmed fraud with the merchant product, and Fraud Scoring Services is credited with a 75 percent cut in fraud losses on the banking page. John Lewis Partnership and Westpac New Zealand appear among references, and the customer figures carry no stated method.

Network intelligence lets banks, processors and networks share industry wide fraud signals, consortium data feeds the merchant product, and product development is listed among uses of transaction data. Opting out of contribution, separation between institutions and what a departing customer's data keeps doing are left unaddressed.

Individuals whose transactions run through ACI products are covered by a privacy policy effective May 20, 2026, with ACI as processor for institutions and merchants and transfers under the EU US and Swiss US Data Privacy Frameworks. Data is kept only as long as needed, with no retention periods published.

Bill payment security material cites more than 20 industry certifications without listing them, beside a 97.6 percent alignment with ISO 27002 controls. Nothing names a certification or attestation for the fraud products themselves.

Federal Financial Institutions Examination Council oversight under its multi region data processing servicer program applies to ACI as a financial data processor, and ACI Payments is a registered money services business. That examination covers the processor rather than the fraud models, and its ratings are not public.

Models that adjust continuously in production are harder to version, validate and audit than periodic retraining, since there is no discrete release to approve or roll back. Fairness testing and disparate impact analysis are unpublished, and the annual report lists AI governance and explainability as risk factors without describing controls.

Correction and deletion rights under the privacy policy give individuals a route to fix their data, and a chargeback protection service for merchants has no published terms. Through the consortium, an adverse inference at one institution can shape decisions at others, with no stated path for a corrected record to follow.

Identity, device and telecommunications data suppliers are not named, and neither is any model provider or a subprocessor list. Amazon Web Services appears in the annual report for computing and analytics, which covers hosting rather than the decision inputs.

The fraud decision sits inside the authorization flow of payments software ACI itself supplies to banks, processors and merchants. A RESTful interface, a cloud marketplace listing and an orchestration platform reaching multiple acquirers surround it.

On premises, cloud and hybrid deployments are all offered, with Fraud Scoring Services on Microsoft Azure alongside a multi tenant platform and a managed service. Hosted options carry no published region or residency commitment.

Fraud products carry no published rate, tier, metering unit or trial, and the annual report describes the segment without prices. Many customers buy fraud management with ACI's payment infrastructure, which leaves open whether fraud scoring is priced per transaction or inside a wider payments agreement.

Issuing, acquiring and merchant sides of the same transaction are all served, with banks, processors and merchants named as buyers in the annual report. Airlines, department stores and consumer banks across Europe and Asia appear among customers, and adjacent products cover anti money laundering, sanctions screening and disputes.