When Documentation Gaps Undermine a Valid Baggage Claim
A passenger with a legitimate baggage disruption on a Cathay Pacific flight recovered only a fraction of their expenses. The airline followed the Montreal Convention correctly. The gap was on the passenger side, and it is a gap most passengers do not realize is forming while it happens.
The situation
A claim was pursued on behalf of a passenger following a baggage disruption on a Cathay Pacific flight. The bag was delayed by several days and then returned in damaged condition. Both the delay and the damage were compensable in principle under the Montreal Convention.
At the airport, the passenger did the most important thing correctly. A Property Irregularity Report was filed before leaving the terminal. This is the single most consequential procedural step in any baggage claim, and skipping it is one of the most common ways passengers weaken their own cases before they even reach the airline.
Beyond that point, however, several documentation choices made during the disruption significantly limited what could be recovered later.
What actually reduced the recovery
The passenger incurred meaningful expenses during the multi-day delay, purchasing replacement items to function while the bag was missing. These purchases were reasonable in principle. The problem was how they were documented and how far they exceeded what the airline's mitigation guidance considered proportionate.
Some purchases were backed by itemized receipts. These items were reimbursed without difficulty. The receipts identified what was purchased, at what price, from which retailer, on what date. Airlines processing baggage delay claims will generally accept these without extended review.
Other purchases were only supported by bank statements or credit card records. These were not reimbursed. A line on a bank statement showing a charge at a retailer establishes that money was spent. It does not establish what was bought. For baggage delay reimbursement, airlines require confirmation that the specific purchases were necessary and consistent with mitigation, and a generic transaction record cannot provide that.
A portion of the expenses exceeded what the airline's guidance considered reasonable for the length of the delay. Montreal Convention practice includes a duty to mitigate, meaning passengers are expected to purchase what they need to function during the disruption, not to rebuild their wardrobe. Airlines publish or reference guidance on what counts as reasonable interim spending, and expenses substantially above that guidance are routinely reduced or excluded on the basis that they were not necessary to address the delay itself.
The damage portion of the claim was even more difficult. The bag was clearly damaged when returned. What was missing was any evidence of its condition before the flight. Without pre-flight photos, the passenger was unable to establish that the damage occurred during the airline's custody as opposed to being pre-existing. The airline was not required to prove that the damage was pre-existing. The passenger was required to prove that it was not, and without documentation, that burden could not be met.
The outcome was a valid claim that recovered only a fraction of what the passenger had actually spent.
Why the airline was not wrong
Nothing about this case involved airline resistance in the sense that the other cases documented in this section describe. Cathay Pacific applied Montreal Convention standards in a way that is broadly consistent with how the Convention is intended to work.
Airlines are not required to reimburse expenses that cannot be verified. They are not required to accept damage claims where the passenger has no evidence of the item's prior condition. They are not required to underwrite spending that exceeds the reasonable scope of mitigation. These are not obstruction tactics. They are the actual evidentiary structure the Convention creates.
The Convention balances two things. It gives passengers a right to recover for genuine losses caused by baggage disruption. It also protects airlines from open-ended claims where the loss cannot be verified or was not necessary. This balance depends on documentation. Documentation is the passenger's responsibility. When it is missing, the airline's position becomes correct almost by default.
See: How Airline Compensation Works
What the Montreal Convention actually requires
The Convention establishes airline liability for delayed, damaged, or lost baggage in international carriage. Compensation is capped at a liability limit calculated in Special Drawing Rights, which currently sits at approximately 1,519 SDR per passenger. This is the maximum, not a floor.
Actual recovery depends on demonstrating loss, and the burden of that demonstration falls on the passenger.
For delayed baggage, the passenger is expected to purchase reasonable interim essentials and to document those purchases in a form that allows the airline to verify them. This means itemized receipts, not payment records. It also means purchases proportionate to the length of the delay and the passenger's actual needs during that period.
For damaged baggage, the passenger is expected to demonstrate that the damage occurred during the airline's custody. Pre-flight photos, particularly for higher-value bags or noticeable existing wear, are the most reliable way to do this. Without them, the airline can reasonably argue that the damage was pre-existing, and the passenger is left with no way to prove otherwise.
For lost baggage, the passenger is expected to document the contents of the bag with as much specificity as possible, including receipts for higher-value items where available. Airlines are entitled to require verification of what was in the bag before accepting a valuation of its contents.
The pattern across all three categories is consistent. The Convention creates a right. The right is enforceable to the extent that it can be documented.
What passengers should actually do
For any international flight where checked baggage is involved, the following practices materially increase the chances of full recovery in the event of a disruption.
Photograph checked bags before every flight. The full exterior, any visible wear or existing damage, and the contents where practical. This takes ninety seconds and provides the evidentiary baseline for any damage claim that may follow.
File a Property Irregularity Report before leaving the airport if a bag is delayed, damaged, or missing. This is non-negotiable. A PIR filed at the airport is the single most important procedural document in any baggage claim. Filing one later, or attempting to raise the issue after leaving the airport, materially weakens the claim.
Keep itemized receipts for every purchase made during a baggage delay. Not payment confirmations. Not bank statements. The actual receipt from the retailer showing what was bought, at what price, on what date. Photograph the receipts as soon as they are received, in case the physical copies are lost.
Keep interim spending proportionate to the delay and to actual necessity. Airlines will generally reimburse the cost of essential items needed to function during the disruption. They will generally not reimburse purchases that go beyond replacement of essentials or that would leave the passenger better off after the delay than before it. When in doubt, err toward what is clearly necessary and buy the rest after the bag is either returned or officially declared lost.
For higher-value bag contents, keep records of what was inside. Photos of the packed bag, receipts for expensive items, and any documentation that could establish the bag's contents in the event it is lost entirely. These become critical if the delay crosses into loss territory, at which point the Convention's liability limits are unlocked and full contents valuation becomes relevant.
Lesson
Airlines are not the only variable in a baggage compensation outcome. Passenger documentation is often the more decisive factor, and it is entirely within the passenger's control before, during, and after a disruption.
Documentation gaps do not always feel consequential in the moment. The delay is stressful, purchases are made quickly, receipts get lost, and the passenger assumes that the underlying facts of the disruption will speak for themselves. They will not. The Convention is a documentary framework. Facts that cannot be documented are, for the purposes of a claim, facts that did not happen.
Understanding this before a disruption occurs is worth significantly more than understanding it after.
See: How Claim Catalyst Handles Airline Resistance, Why Escalation Is Sometimes Required
Why most passengers lose ground here
Most passengers approach a baggage disruption reactively. The bag is missing, replacements are needed, receipts pile up loosely, and the assumption is that the airline will make things right at the end of the process.
That assumption is partially correct. Airlines will make things right, but only within the scope of what can be documented and what can be shown to be reasonable. Everything outside those two boundaries is at risk of not being recovered, regardless of how genuine the underlying expense was.
The passengers who recover most successfully are the ones who treat the disruption from the first moment as a documentary event. Every purchase gets a receipt. Every receipt gets photographed. Every relevant airline interaction gets logged. This is not an unreasonable amount of work for the amount at stake, but most passengers do not realize the work is worth doing until the reimbursement decision comes back reduced.
Bigger picture
Airline compensation is a framework of documented rights. The rights exist regardless of documentation. The recovery does not.
For substantive claims where an airline is engaged in resistance tactics, documentation is what enables enforcement against the airline's position. For claims where the airline is applying the rules reasonably, documentation is what enables recovery within those rules. In both cases, the difference between a full recovery and a partial one is often not the underlying facts of the disruption. It is the record of those facts that the passenger is able to produce.
This is one of the least dramatic aspects of airline compensation and one of the most decisive. Airlines have entire departments structured around processing documented claims and rejecting undocumented ones. Passengers who understand this before a disruption occurs recover meaningfully more than those who learn it afterward.
See: What Claim Catalyst Actually Does For You
Frequently asked questions
Does a bank statement or credit card record count as proof of purchase for baggage claims?
Generally no. Airlines processing baggage claims require itemized receipts that identify the specific items purchased, the price, the retailer, and the date. A generic transaction record establishes that money was spent but not what it was spent on, which is insufficient to verify that the purchase was necessary and consistent with mitigation. Keep the itemized receipt for every purchase made during a baggage disruption.
What is a Property Irregularity Report and when should I file one?
A Property Irregularity Report, commonly abbreviated PIR, is the formal record of a baggage disruption filed with the airline at the airport. It should be filed before leaving the terminal, at the airline's baggage services desk. A PIR is the foundational document for any subsequent baggage claim. Filing one late or not at all materially weakens the passenger's ability to recover.
How much can I spend on replacement items during a baggage delay?
There is no fixed cap, but airlines apply a duty to mitigate under the Montreal Convention. Passengers are expected to purchase what is necessary to function during the delay, proportionate to the length of the delay and their actual needs. Expenses that exceed what can reasonably be justified as necessary, particularly on a short delay, are commonly reduced or excluded during the reimbursement process. When uncertain, err toward essential replacements and hold off on larger purchases until the bag is either returned or declared lost.
Can I claim for damage to my bag if I do not have photos of it before the flight?
Yes, but the claim is significantly weaker. Without pre-flight documentation of the bag's condition, the passenger is unable to establish that the damage occurred during the airline's custody. Airlines are not required to prove the damage was pre-existing. The passenger is required to prove it was not. Pre-flight photos of checked bags, including any existing wear, are the most reliable way to preserve this ability.
If you have experienced a baggage disruption and want to understand what portion of your expenses is realistically recoverable given the documentation available, Claim Catalyst evaluates each claim on its evidentiary merits and pursues recovery for what can be substantiated. Start a claim or learn more about how the Montreal Convention applies to baggage claims.