During the use of the ship, the ship's own documentation is also very important. The following are the four ship's own documents:

1. The certificate of residence is used to prove the nationality of the ship.

2. Proof of age certification Some countries/regions have come to provide evidence that the age of ships carrying cargo must not exceed 15 years. The beneficiaries must require the shipping agency or shipping company to issue a certificate of the age of the loading vessel. The main purpose of such requirements is to prohibit the use of vessels. Older ships protect the safety of cargo transportation.

3. If the container ship proves that the importer or the bank stipulates in the contract/letter that the goods are to be loaded on the container ship and the corresponding certificate is issued, the beneficiary may make and stamp the seal of the issuer, and may also indicate on the transport document. .

4. The class certification proves that the internationally renowned classification societies include Lloyd's of the United Kingdom, German classification society (GL), Norwegian classification society (DNV), French classification society (BV), Japan Maritime Association (NK), and American class Agency (ABS) and so on.