To claim lost luggage insurance in 2026, you must first act immediately at the airport. Head to the airline's baggage service desk before leaving the arrivals hall to file a Property Irregularity Report (PIR). This document is the most critical piece of evidence for both the airline and your insurance provider; ensure you keep a copy with the reference number. If your bags are missing for more than a few hours, you may be eligible for "essential item" reimbursement. Keep all original receipts for emergency purchases like toiletries and basic clothing. Once the airline officially declares the bag "lost" (usually after 21 days), contact your insurance company to start a formal claim. You will typically need to submit the PIR, your boarding pass, baggage tags, a detailed list of the bag's contents with estimated values, and proof of purchase for high-value items. Many insurers now offer digital claim portals to speed up the process, but persistence and meticulous record-keeping remain the keys to a successful settlement.