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Positive Pay — Western Alliance Bancorporation

Western Alliance Bancorporation’s Positive Pay is a comprehensive check and ACH fraud detection solution designed to protect businesses of all sizes from unauthorized or altered payments. Built to fit into modern treasury operations, Positive Pay combines automated transaction validation, flexible exception handling, and robust reporting so corporate customers can reduce risk, streamline reconciliation, and maintain stronger internal controls.

Overview

Positive Pay is an account-level fraud prevention service that compares checks and ACH transactions presented for payment against a company’s issued items. Organizations provide a file or send transmission data that lists authorized checks and ACH authorizations. When an item is presented to the bank for payment, Positive Pay automatically matches it against the issued items. Items that do not match are flagged as exceptions and held for customer review according to predefined rules. This real-time validation helps prevent check washing, counterfeit checks, altered payees, and unauthorized electronic debits.

Key Features

• Check Positive Pay: Matches MICR line data, amount, account number, and issue date to detect discrepancies.
• ACH Positive Pay: Evaluates inbound ACH debits against authorized ACH files and prenotifications to block unauthorized electronic transactions.
• Return Positive Pay: Manages and presents returned items, enabling prompt decision-making on re-presentment or resolution.
• Flexible Exception Handling: Customizable rules to automatically pay, return, or hold items for manual review based on dollar thresholds or other criteria.
• Multi-Channel File Upload: Supports secure transmission via online banking portal, file upload, or automated host-to-host integration.
• Item Imaging and Paid Check Images: Provides images of presented items to facilitate quick verification and audit trails.
• Real-time Alerts and Notifications: Email and in-app alerts to designated approvers about exceptions requiring review.
• User Roles and Dual Approval: Segregated duties with configurable permissions and multi-level approvals to strengthen internal controls.

How It Works

1. Customer transmits an issued-item file that lists checks and ACH authorizations to Western Alliance on a regular schedule.
2. As items are presented for payment, the bank’s system automatically compares each item against the issued-item file.
3. Matching items are processed normally. Mismatches are routed to an exceptions queue with images and details.
4. Authorized reviewers access the exceptions queue via the secure portal to accept, return, or escalate items according to corporate policy.
5. Decisions are logged to provide a full audit trail for compliance and internal review.

Benefits

• Reduced Fraud Losses: Early detection and blocking of unauthorized items minimize financial exposure.
• Improved Cashflow Management: Faster, more accurate reconciliation reduces uncertainty around available funds.
• Stronger Internal Controls: Role-based access and dual-approval workflows support corporate governance and regulatory compliance.
• Operational Efficiency: Automation reduces manual reconciliation time and paper handling, freeing staff for higher-value tasks.
• Auditability: Comprehensive logs, exception histories, and item images provide evidence for audits and investigations.

Implementation and Integration

Western Alliance provides implementation support to integrate Positive Pay into existing treasury operations. The solution accepts standard file formats for issued-item transmissions and can be adapted to integrate with popular accounting and ERP systems. Implementation typically includes onboarding, file mapping, schedule setup, user access configuration, and testing to ensure seamless operation with minimal disruption to daily workflows.

Security and Compliance

Security is central to Positive Pay. Transmission channels utilize strong encryption and secure authentication. User access is governed by role-based permissions and multi-factor authentication where available. Systems maintain detailed transaction logs and immutable records of decisions for regulatory compliance and internal audits. By incorporating Positive Pay into treasury processes, organizations demonstrate proactive risk management aligned with best practices for fraud prevention and governance.

Reporting and Analytics

Built-in reporting capabilities provide daily exception summaries, historical trend analysis, and customizable reports for reconciliation and oversight. Analytics can highlight patterns such as repeated attempts, common payees, and unusual timing, enabling treasury teams to refine controls and detect emerging threats. Reports can be scheduled or generated on demand to support board reporting, internal reviews, and external audits.

Best Practices

• Provide issued-item files promptly and consistently to maximize match rates and reduce false exceptions.
• Establish clear review processes with defined escalation paths and thresholds for automatic handling.
• Implement dual controls for exception approvals to reduce insider risk.
• Regularly review reports and trends to adjust rules, thresholds, and workflows as fraud patterns evolve.
• Coordinate Positive Pay with other fraud controls such as account reconciliation, ACH prenotes, and secure vendor payment practices.

Who Should Use Positive Pay

Positive Pay is ideal for corporations, government entities, non-profits, and any organization that issues checks or receives ACH debits. It is particularly valuable for businesses with high volume payment activity, those exposed to check or ACH fraud risk, or organizations subject to stringent internal control and audit requirements.

Conclusion

Western Alliance Bancorporation’s Positive Pay is a proven, configurable solution for preventing check and ACH fraud while improving reconciliation efficiency and strengthening financial controls. By combining automated matching, flexible exception workflows, secure transmission, and comprehensive reporting, Positive Pay helps treasury teams protect assets, streamline operations, and support compliance—enabling organizations to operate with greater confidence in an increasingly complex payment environment.

Address Bank: CityScape Phoenix, Arizona, U.S.
Bank: Western Alliance Bancorporation
Headquarters: Phoenix
Products: Payments & Treasury
Type: Positive Pay