If you insist on full reimbursement , the airline may ask for the items back before reimbursing you. If Your Luggage Is Lost If your luggage is lost, make sure you file a claim before leaving the airport. You are allowed 21 to 45 days to file, depending on the airline, but the more quickly you file, the better off you will be. You must submit a list of the lost items , where and when they were purchased and the cost. At this point, procedures can become arbitrary and infuriating.
Airlines tend to be suspicious of fraud .
Some tactics seem designed to wear you down. Keep a copy of your claim along with the persons name who you provided the form . Also keep your luggage checks and a copy of your airline ticket. This is you only proof you were on the flight. They may demand sales slips for lost items, especially if you've listed anything expensive or purchased recently.