Instruct: Given a statement, retrieve articles that support it
Query: 
In cases where it is already established conclusively at the time of the performance of the applicable juristic act that a certain condition will not be fulfilled, if such condition is a condition subsequent, such juristic act shall be unconditional; on the other hand, if such condition is a condition precedent, such juristic act shall be void.


Article 131
(1) If a condition has already been fulfilled at the time of a juridical act and that condition is a condition precedent, the juridical act constitutes an unconditional juridical act; if that condition is a condition subsequent, the juridical act is void.
(2) If it has already been established at the time of a juridical act that a condition will not be fulfilled and that condition is a condition precedent, the juridical act is void; if that condition is a condition subsequent, the juridical act constitutes an unconditional act.
(3) In the cases referred to in the provisions of the preceding two paragraphs, the provisions of Article 128
and Article 129
apply mutatis mutandis until the relevant party becomes aware that the condition has been or has not been fulfilled..


Article 124
(1) The ratification of a voidable act does not become effective unless it is made after the circumstances that made the act voidable cease to exist and the person ratifying the act becomes aware of the right to rescind it.
(2) In the following cases, the ratification referred to in the preceding paragraph is not required to be made after the circumstances that made the act voidable cease to exist:
(i) if a legal representative or a curator or assistant of a person with qualified legal capacity ratifies the act; or
(ii) if a person with qualified legal capacity (excluding an adult ward) makes the ratification with the consent of a legal representative, curator or assistant.
Article 125
If, at or after the time when it becomes possible to ratify an act, any of the following facts occur with respect to a voidable act, it is deemed that the act has been ratified;provided, however, that this does not apply if an objection is reserved:
(i) full or partial performance;
(ii) request for the performance;
(iii) novation;
(iv) provision of a security;
(v) assignment of a part of or the whole of a right acquired by the voidable act; or
(vi) compulsory execution..


Article 123
If the counterparty to a voidable act is identified, the voidance or ratification of that act is made by the manifestation of intention to the counterparty..


Article 437
Even if there are grounds for the invalidity or rescission of a juridical act with respect to one of the joint and several obligors, the validity of the obligation of other joint and several obligor is not impaired..


Article 120 (2) An act that is voidable on the grounds of a mistake, fraud or duress may be rescinded only by the person who made the defective manifestation of intention, or an agent or successor thereof.


Article 166 (1) A claim is extinguished by prescription in the following cases:
(i) if the obligee does not exercise the right within five years from the time when the obligee came to know that it was exercisable; or
(ii) if the obligee does not exercise the right within 10 years from the time when it became exercisable.


Article 5
(1) A minor must obtain the consent of the minor's legal representative to perform a juridical act;provided, however, that this does not apply to a juridical act for merely acquiring a right or being released from an obligation.
(2) A juridical act in contravention of the provisions of the preceding paragraph is voidable.
(3) Notwithstanding the provisions of paragraph (1), a minor may freely dispose of property that the legal representative has permitted the minor to dispose of for a specified purpose, to an extent that falls within the scope of that purpose. The same applies if the minor disposes of property that the legal representative has permitted the minor to dispose of without specifying a purpose..


Article 653
A mandate terminates when:
(i) the mandator or mandatary dies;
(ii) the mandator or mandatary is subject to an order commencing bankruptcy proceeding;
(iii) the mandatary is subject to a decision for the commencement of guardianship..


Article 424-7 (1) In an action concerning demand for rescission of fraudulent act, the person specified in each of the following items according to the categories set forth in the respective items stands as a defendant:
(i) an action concerning demand for rescission of fraudulent act against the beneficiary: the beneficiary; or
(ii) an action concerning demand for rescission of fraudulent act against the subsequent acquirer: the subsequent acquirer that is the other party to the demand for rescission of fraudulent act.
(2) If the obligee files an action concerning demand for rescission of fraudulent act, the obligee must give notice of suit to the obligor without delay.


Article 450
(1) If an obligor has the obligation to provide a guarantor, that guarantor must:
(i) be a person with capacity to act; and
(ii) have sufficient financial resources to pay the obligation.
(2) If the guarantor ceases to meet the requirements set forth in item (ii) of the preceding paragraph, the obligee may demand that some other person meeting the requirements set forth in any item of the same paragraph be substituted for that guarantor.
(3) The provisions of the preceding two paragraphs do not apply if the obligee has designated the guarantor..


Article 519
If an obligee manifests the intention to release an obligor from an obligation to that obligor, the obligee's claim is extinguished.
Article 705
A person that has paid money or delivered anything as performance of an obligation may not demand the return of the money paid or thing delivered if the person knew, at the time, that the obligation did not exist..


Article 9
A juridical act performed by an adult ward is voidable;provided, however, that this does not apply to the purchase of daily necessities or to any other act involved in day-to-day life..


Article 117 (1) A person who concludes a contract as an agent of another person is liable to the counterparty for the performance of the contract or compensation for loss or damage, as chosen by the counterparty, unless the person proves the authority to represent or the principal ratifies the contract.
(2) The provisions of the preceding paragraph do not apply in the following cases:
(i) if the counterparty knew that the person who concluded the contract as an agent of the other person had no authority to represent;
(ii) if the counterparty was negligent in not knowing that the person who concluded the contract as an agent of the other person had no authority to represent; provided, however, that this does not apply if the person who concluded a contract as an agent of the other person knew themselves to have no authority to represent; or
(iii) if the legal capacity to act of the person who concluded the contract as an agent of the other person was subject to restrictions.


Article 424 (1) An obligee may demand the court to rescind an act which the obligor commits knowing that it will prejudice the obligee; provided, however, that this does not apply if a person that benefits from that act (hereinafter referred to as the "beneficiary" in this Subsection) does not know, at the time of the act, that the obligee will be prejudiced.


Article 526
If an offeror dies, comes to be in a constant state wherein the offeror lacks mental capacity, or becomes subject to restrictions on legal capacity to act after issuing notice of the offer, and the offeror has manifested the intention not to make the offer effective should any of these facts occur, or the other party comes to know that any of these facts has occurred before issuing a notice of acceptance, that offer is not effective..


Article 449
If a guarantor that guarantees an obligation which may be voidable due to the principal obligor's limited capacity to act, is aware, at the time of entering into a guarantee contract, of the cause for its voidability, that guarantor is presumed to have assumed an independent obligation of the same subject matter in the event of non-performance by the principal obligor or rescission of the obligation..


Article 97
(1) A manifestation of intention becomes effective at the time notice thereof reaches the other party.
(2) If the other party prevents notice of a manifestation of intention from reaching them without a legitimate reason, the notice is deemed to have reached that party at the time it would have normally reached them.
(3) The effect of a manifestation of intention is not impaired even if the person making it dies, loses mental capacity, or becomes subject to restrictions on their legal capacity to act after having sent the notice..


Article 412-2 (1) If the performance of an obligation is impossible in light of the contract or other sources of claims and the common sense in the transaction, the obligee may not request the performance of the obligation.
(2) The impossibility of the performance of an obligation based on a contract as of the time of the formation of the contract does not preclude claiming compensation for loss or damage that arises from the impossibility of the obligation pursuant to the provisions of Article 415.


Article 120
(1) An act that is voidable on the grounds of the qualified legal capacity to act of the person who did the act may be rescinded only by the person with qualified legal capacity (in the case of an act performed by the person as a legal representative of another person with limited capacity, including that other person with limited capacity), or an agent or successor thereof, or a person who has the authority to give consent thereto.
(2) An act that is voidable on the grounds of a mistake, fraud or duress may be rescinded only by the person who made the defective manifestation of intention, or an agent or successor thereof..


Article 94
(1) A false manifestation of intention that a person makes in collusion with another person is void.
(2) The nullity of a manifestation of intention under the provisions of the preceding paragraph may not be duly asserted against a third party in good faith.
Article 101
(1) If the validity of a manifestation of intention that an agent has made to the other party is to be influenced by the absence of intention; by mistake, fraud, or duress; or by the knowledge of or negligence in not knowing of a particular circumstance; whether or not any such fact was present is decided as it concerns the agent.
(2) If the validity of a manifestation of intention that the other party has made to the agent is to be influenced by the recipient's knowledge of or negligence in not knowing of a particular circumstance, whether or not any such fact was present is decided as it concerns the agent.
(3) If an agent who has been entrusted with performing a specific juridical act performs that act, the principal may not assert that the agent did not know of any particular circumstance of which the principal knew. The same applies to any circumstance of which the principal did not know due to the principal's own negligence..


Article 295
(1) If a possessor of a thing belonging to another person has a claim that has arisen in relation to that thing, that possessor may retain that thing until that claim is satisfied;provided, however, that this does not apply if the relevant claim has not yet fallen due.
(2) The provisions of the preceding paragraph do not apply if possession commenced by means of a tortious act..


Article 20
(1) After a person with qualified legal capacity who is involved in dealings with another party becomes a person with the legal capacity to act (meaning a person whose legal capacity to act is not subject to restrictions; the same applies hereinafter), the other party to those dealings may fix a period of one month or longer and demand that the person give a definite answer within that period of time as to whether the person will ratify an act that the person may rescind. In such a case, if the person fails to send a definite answer within that period of time, the person is deemed to have ratified that act.
(2) The second sentence of the preceding paragraph also applies if, before the person with qualified legal capacity becomes a person with the legal capacity to act, the other party to dealings involving the person with qualified legal capacity lodges the demand prescribed in the preceding paragraph with the legal representative, curator, or assistant of that person with respect to an act within the scope of their authority, and they fail to send a definite answer within the fixed period of time referred to in that paragraph.
(3) If a person does not send notice within the period of time set forth in the preceding two paragraphs indicating that the person has completed any special formalities that an act requires, the person is deemed to have rescinded that act.
(4) The other party to dealings involving a person with qualified legal capacity may lodge a demand with a person under curatorship or with a person under assistance who is subject to a decision as referred to in Article 17, paragraph (1) to demand that the person get the curator or assistant to ratify an act within the fixed period referred to in paragraph (1). In such a case, if the person under curatorship or person under assistance does not send notice within that period indicating that the person has gotten the curator or assistant to ratify the act in question, the person is deemed to have rescinded that act..


Article 117
(1) A person who concludes a contract as an agent of another person is liable to the counterparty for the performance of the contract or compensation for loss or damage, as chosen by the counterparty, unless the person proves the authority to represent or the principal ratifies the contract.
(2) The provisions of the preceding paragraph do not apply in the following cases:
(i) if the counterparty knew that the person who concluded the contract as an agent of the other person had no authority to represent;
(ii) if the counterparty was negligent in not knowing that the person who concluded the contract as an agent of the other person had no authority to represent;provided, however, that this does not apply if the person who concluded a contract as an agent of the other person knew themselves to have no authority to represent; or
(iii) if the legal capacity to act of the person who concluded the contract as an agent of the other person was subject to restrictions..


Article 96
(1) A manifestation of intention based on fraud or duress is voidable.
(2) If a third party commits a fraud inducing a first party to make a manifestation of intention to a second party, that manifestation of intention is voidable only if the second party knew or could have known that fact.
(3) The rescission of a manifestation of intention induced by fraud under the provisions of the preceding two paragraphs may not be duly asserted against a third party in good faith acting without negligence..


Article 101
(1) If the validity of a manifestation of intention that an agent has made to the other party is to be influenced by the absence of intention; by mistake, fraud, or duress; or by the knowledge of or negligence in not knowing of a particular circumstance; whether or not any such fact was present is decided as it concerns the agent.
(2) If the validity of a manifestation of intention that the other party has made to the agent is to be influenced by the recipient's knowledge of or negligence in not knowing of a particular circumstance, whether or not any such fact was present is decided as it concerns the agent.
(3) If an agent who has been entrusted with performing a specific juridical act performs that act, the principal may not assert that the agent did not know of any particular circumstance of which the principal knew. The same applies to any circumstance of which the principal did not know due to the principal's own negligence.
Article 96
(1) A manifestation of intention based on fraud or duress is voidable.
(2) If a third party commits a fraud inducing a first party to make a manifestation of intention to a second party, that manifestation of intention is voidable only if the second party knew or could have known that fact.
(3) The rescission of a manifestation of intention induced by fraud under the provisions of the preceding two paragraphs may not be duly asserted against a third party in good faith acting without negligence..
