In international air transport, airlines stipulate that fragile luggage needs to be checked as fragile. The staff will attach fragile labels and ask passengers to sign on the back of the luggage tag for confirmation. This process of signature confirmation is actually a process of signing an exemption agreement. Even if the passengers do not sign this agreement, the airline will not compensate for the damage to the content. This is the universal law of the international aviation industry.

Airlines usually explain that if the checked fragile baggage is damaged during transportation, they will deal with it according to the situation, such as the damage of the contents caused by the crushed baggage or the pollution of corrosive substances in other passengers' luggage. However, the practice of airlines is to exempt fragile items, which does not mean that passengers can be exempted from liability for compensation.

Please note that the above information is based on public information, and the specific provisions may be different for different airlines or specific situations. If it is necessary to check fragile items, it is recommended to consult the relevant regulations of airlines in detail or contact airlines directly to understand the specific operation process and liability terms.