Mark Jayson N.

Chargeback Management: Investigating cardholder disputes, validating claims, and initiating chargebacks in compliance with Visa/Mastercard rules. Representment Handling: Reviewing merchant evidence, preparing representment packages, and ensuring compliance with card network regulations. Regulatory Compliance: Applying Visa Core Rules and Mastercard Chargeback Guide to ensure proper dispute resolution. Fraud & Risk Analysis: Identifying patterns of fraudulent activity and escalating cases when necessary. Stakeholder Communication: Coordinating with merchants, issuers, and internal teams to resolve disputes efficiently. Philippine National Bank – On-the-Job Training (Clerical Services) Intern / Trainee Performed clerical services including typing, filing, and document management. Assisted with office operations by encoding data into computer systems. Practiced professional phone courtesy and customer service. Supported administrative staff with daily tasks to ensure smooth workflow.