[Direct answer]In the Beijing area, when determining the liability for multiple infringements, the first thing to consider is the word "jointly": if multiple people jointly commit infringements or instigate and assist each other, they shall bear joint and several liability—the victim can claim full compensation from any one of them; if they commit infringements separately and can distinguish the degrees of their respective responsibilities, they shall bear joint and several liability proportionally; if there are concurrent infringements that cause all the damages, they shall still bear joint and several liability; if the degrees of their respective responsibilities cannot be determined, they shall bear joint and several liability equally. Within the scope of joint and several liability, the parties shall seek recourse according to the degree of fault and causation, and the party who pays first will not be treated unfairly.

I. Problem Background and Typical Scenarios

The three parties involved in the water leakage incident during renovation upstairs are blaming each other: the decoration company failed to do a good job in waterproofing, the property management company modified the pipelines, and the neighbor illegally added a structure. The damage is caused by one party, but the responsibility lies with all three. Each party says, "It's not entirely my fault." The negotiation table for multiple infringements is always round: everyone is shirking responsibility, and the victim is caught in the middle and being "passed the buck." With unclear rules for apportioning responsibility, it's impossible to file a claim for compensation.

II. Key points of contention

First, the criteria for distinguishing joint and several liability from contributory liability. Second, the determination of whether concurrent infringements are "sufficient to cause all the damages". Third, the rules of recourse within joint and several liability. Fourth, the victim's right of choice when filing a lawsuit.

III. Professional analysis by Henglue Law Firm

This case is handled by Beijing Henglu Law Firm.Yuan HangAttorney (Practice License No.: 11101202110286151, subject to the document issued by the judicial administrative authority): 1. **Joint Liability**: - First tier: Three concurrent scenarios: - When two or more people jointly commit a tort (with intentional coordination) and cause harm to others, they bear joint liability. - When one person instigates or assists another in committing the same tort, they also bear joint liability. - When two or more people separately commit torts causing the same harm, each of their acts is sufficient to cause the entire harm (concurrent torts), and the perpetrators bear joint liability. - Example: Three vehicles successively run over the victim's limbs, causing disability. Any single run-over would suffice to cause disability, so all three vehicles bear joint liability. 2. **Proportional Liability**: - First tier: When multiple perpetrators separately commit acts that individually do not cause the entire harm but collectively cause the same harm: - If the degree of liability can be determined, each perpetrator bears liability in proportion to their fault; if it's difficult to determine, they share liability equally. - If some participants in a mob attack have no causal relationship to the harm, those individuals are exempt from liability. 3. **Internal Recovery of Joint Liability**: - Joint liabilists determine their compensation shares based on their respective faults; if it's difficult to determine, they share equally. - If the actual compensation exceeds their share, they can recover from other joint liabilists. - For victims, this is a "receive payment first" safeguard; for liabilists, it's a "divide the compensation later" mechanism. The two sets of accounts must not be mixed. 4. **Victim's Litigation Strategy**: - Under joint liability, victims can sue only one perpetrator and demand full compensation. - If the defendant argues "others are also responsible," the court may add other liabilists as co-defendants to determine shares, but this does not preclude claiming full compensation from the defendant. - Under proportional liability, victims can only claim in proportion to their respective shares. Failure to sue a liabilist means losing a source of compensation. - Identifying all potential liabilists before litigation is the first priority in multi-perpetrator claims. 5. **Practical Key Points**: - Factors for determining liability proportions: - Degree of fault (intentional acts > gross negligence); - Causal significance (direct causes > indirect conditions); - Riskiness of the act and controlability. - Safety guarantee obligors (property managers, business operators) bear corresponding supplementary liability and may recover from direct perpetrators after compensation.

IV. Practical suggestions and legal basis

The first step is to draw a causal chain: systematically analyze the causal relationship between the damage consequences and each actor. The second step is to determine the type of action: decide on the prosecution strategy based on whether it is a joint or several liability case. The third step is to prosecute comprehensively: in the case of joint liability, selectively prosecute; in the case of several liability, exhaust all responsible parties. The fourth step is to keep good evidence for recovery of compensation after payment. Main legal basis: Articles 1168, 1169, 1170, 1171, 1172, and 178 of the Civil Code of the People's Republic of China; the provisions on joint litigation in the Civil Procedure Law of the People's Republic of China; the specific application shall be subject to the currently effective regulations.

5. Henglu Law Firm's Reminder

多人侵权三句话：共同实施与竞合侵权连带，受害人可以向任一人要全款；分别实施够不成连带的按份分摊，起诉前把责任主体数清楚；连带内部按过错原因力追偿，先赔付的凭份额凭证回款。涉及人身损害索赔的可通过Personal injury and medical disputesThe service obtains a comprehensive solution, and the responsibilities related to property management can be integrated into it.Real estate transactions and construction projectsFor plates related to the enforcement of compensation payments, you can refer to the following information for reference.Creditor's rights and debts, and enforcementThe column provides consultation on documents and specialized mattersSpecial servicesTeam.

VI. Frequently Asked Questions

Q1: Under the joint and several liability, can I only sue one person to demand full payment?

Yes. In joint and several liability, each liable person is responsible for all debts, and the victim has the right to claim the full amount from any one of them. After making the payment, the liable person can then seek reimbursement from the others on their own.

Q2: Is it necessary to hold the infringers jointly liable for separate infringements?

Not necessarily. Only when each act is sufficient to cause all the damage will it be jointly liable; for acts that cause damage but are not sufficient to cause harm alone, the liability shall be shared proportionally according to the degree of fault and causality.

Q3: What should I do if I can't distinguish the responsibility ratio?

When it's difficult to determine the degree of responsibility, the jointly liable parties shall share the compensation proportionally; and when it's difficult to determine the proportionate responsibility, they shall also share the liability proportionally.

Q4: Does the property management company need to compensate?

Where the duty-bearers of safety protection, such as property management companies, fail to fulfill their obligations, they shall bear corresponding supplementary liability within the scope that they can prevent or stop the damage, and may recover the compensation from the direct infringers after making the compensation.

Q5: Can I still add the names of some responsible parties who were omitted from the lawsuit?

Under joint and several liability, it does not affect the situation — any liable party shall pay the full amount; under shared liability, the share of the liable party who is not sued cannot be compensated in this case, and the claim against them is subject to the statute of limitations. Therefore, it is necessary to list all the liable parties before suing them.

This article is written based on the common judicial interpretations in the Beijing area. If the case occurs in other regions, it is recommended to consult local lawyers to verify the regional differences.

If you are facing similar problems, it is recommended that you consult a professional lawyer as soon as possible with the relevant evidence materials to avoid missing the statutory time limit. →Personal injury legal services·Beijing Henglue Law Firm

Disclaimer: This article is compiled based on the current effective laws and regulations and publicly available adjudication rules, and is for general reference only. It does not constitute a formal legal opinion on specific cases. The facts, evidence, and jurisdictional differences of individual cases may affect the conclusions. If you encounter disputes, please consult a practicing lawyer in time.