You can ask, but proof is much stronger with an itemized receipt. Preserve alternative evidence such as card transactions while checking the airline's documentation rules.
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What to check
Keep itemized receipts and the airline’s written offer of help. A bill shows what you paid; you may still need to show why the cost was necessary and who should cover it.
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What to do next
List each cost separately and attach the receipt. The expense tracker can help you organize the amounts without treating them as approved.
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Official sources
- Japan Airlines: JAL international flight expense reimbursement
- Travel Guard: Documents required to file a travel insurance claim
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Your route and travel date may change the answer. Check the linked official rule.