Residential Location from Purchase Patterns

Imagine you're tasked with creating a fraud detection system for a major bank, such as Bank of America. This system is designed to analyze credit card transactions and flag any activity that occurs outside of a customer's usual residential area as potentially fraudulent. To achieve this, you must determine a customer's likely place of residence based on their credit card transaction history. What approach would you take to deduce a customer's home location from their purchasing behavior?