1. First of all, if a friend of the party enters into a contract with the other party without authorization from the party but has the party's vehicle and relevant licenses, the agency act is valid. Secondly, whether the party responsible for the accident is responsible depends on whether the friend of the party was at fault when renting the car, such as renting the vehicle to a person who is not qualified to drive, renting to a person suspected of drunk driving or driving under the influence, or knowing that the vehicle has safety defects. If a friend of the party concerned has the above-mentioned fault, he or she will be responsible for the accident. In this case, the car owner and the taxi driver shall be jointly and severally liable for compensation.

As a motor vehicle owner, the party concerned should keep and take good care of his motor vehicle, driving license, driving permit and other certificates according to law. However, the party concerned handed over the vehicle and related certificates to a friend for safekeeping, which should be sufficient to constitute a violation of the People's Republic of China* **Article 49 of the Contract Law of the People's Republic of China stipulates that even if the friend of the party does not have the right of agency, exceeds the right of agency, or the right of agency is terminated, in a contract entered into in the name of the principal (in the name of the party), the counterparty has reason to believe that the agent With agency authority.

Therefore, the agency act is valid, and even if the party, as the car owner, has not signed any written contract, he should still bear corresponding responsibilities.

2. If there is no power of agency, the power of agency exceeds the power of agency, or the power of agency terminates a contract made in the name of the principal, and the counterparty has reasons to believe that the agent has agency authority, the agency act is valid.

The judicial basis is Article 49 of the Contract Law of the People's Republic of China