If you are troubleshooting a website integration, transaction logs won't help. You need the raw server-to-server conversation.
Effective logging of PayPal activity requires structured, centralized, and secure collection of relevant events and metadata, combined with sensible retention and privacy controls. Well-instrumented logs accelerate troubleshooting, support reconciliation, improve fraud detection, and provide evidence for audits and disputes. paypal logs
: 4xx errors usually mean something is wrong with your request (e.g., 401 Unauthorized), while 5xx errors indicate a PayPal server issue. improve fraud detection