Explainable AI Framework for Credit Card Fraud Detection Using Hybrid Machine Learning Models
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The rapid growth of digital payment systems has significantly increased the sophistication and frequency of credit card fraud, making accurate and interpretable fraud detection models a critical requirement for financial institutions. While advanced machine learning algorithms have demonstrated high predictive performance, their limited interpretability often restricts adoption in highly regulated financial environments where transparent decision-making is essential. This paper proposes an Explainable Artificial Intelligence (XAI) framework that integrates hybrid machine learning models with explainability techniques to improve fraud detection while maintaining regulatory transparency. The proposed framework combines supervised learning algorithms, including Random Forest, Gradient Boosting, and Extreme Gradient Boosting (XGBoost), with feature attribution methods such as SHAP and LIME to provide interpretable explanations for fraud predictions. In addition, data preprocessing techniques addressing class imbalance and feature engineering are incorporated to enhance predictive performance. Experimental evaluation on publicly available credit card transaction datasets demonstrates that the hybrid framework achieves improved detection capability while enabling analysts to understand the key factors influencing model decisions. The proposed approach supports compliance with emerging regulatory expectations for explainable artificial intelligence in financial services and assists fraud investigators in making informed operational decisions. The framework contributes toward building trustworthy AI systems capable of balancing prediction accuracy with transparency in modern digital payment ecosystems.