Instruct: Given a statement, retrieve legal articles that support it
Query: 
Even in cases where costs, incurred by a mandatary in order to administrate the  mandated business with the care of a good manager, are later deemed as a result not to be necessary, the mandatary can demand reimbursement of those fees to the mandator.


Article 650
(1) If the mandatary has expended costs found to be necessary for the administration of the mandated business, the mandatary may claim reimbursement of those costs from the mandator and any interest on the same from the day the costs were expended.
(2) If the mandatary has borne any obligation found to be necessary for the administration of the mandated business, the mandatary may demand that the mandator perform the obligation on the mandatary's behalf. In such cases, if the obligation has not yet fallen due, the mandatary may require the mandator to tender reasonable security.
(3) If a mandatary incurs loss or damage that is not due to the negligence of the mandatary in order to administer the mandated business, the mandatary may claim compensation for this from the mandator..


Article 656
The provisions of this Section apply mutatis mutandis to entrustments of business that do not constitute juridical acts.
Article 648
(1) In the absence of any special agreements, the mandatary may not claim remuneration from the mandator.
(2) If a mandatary is to receive remuneration, the mandatary may not claim this until after having performed the mandated business;provided, however, that if the remuneration is specified with reference to period, the provisions of Article 624, paragraph (2) apply mutatis mutandis.
(3) In the following cases, the mandatary may demand remuneration in proportion to the performance already completed:
(i) if the mandatary is no longer able to perform the mandated business due to any grounds not attributable to the mandator; or
(ii) if the mandate is terminated during the course of performance..


Article 702
(1) If a manager has incurred beneficial expenses for a principal, the manager may claim reimbursement of those costs from the principal.
(2) The provisions of Article 650, paragraph (2) apply mutatis mutandis if a manager has incurred beneficial obligations on behalf of the principal.
(3) If a manager has engaged in the benevolent intervention in another's business against the will of the principal, the provisions of the preceding two paragraphs apply mutatis mutandis, solely to the extent currently enriched.
Article 697
(1) A person that has begun to manage a business for another person without being obligated to do so (hereinafter in this Chapter referred to as a "manager") must manage that business, in accordance with the nature of the business, in the way that best suits the interests of the principal (hereinafter referred to as "benevolent intervention in another's business").
(2) A manager must engage in benevolent intervention in another's business in accordance with the intentions of the principal if the manager knows, or is able to conjecture that intention.
Article 650
(1) If the mandatary has expended costs found to be necessary for the administration of the mandated business, the mandatary may claim reimbursement of those costs from the mandator and any interest on the same from the day the costs were expended.
(2) If the mandatary has borne any obligation found to be necessary for the administration of the mandated business, the mandatary may demand that the mandator perform the obligation on the mandatary's behalf. In such cases, if the obligation has not yet fallen due, the mandatary may require the mandator to tender reasonable security.
(3) If a mandatary incurs loss or damage that is not due to the negligence of the mandatary in order to administer the mandated business, the mandatary may claim compensation for this from the mandator..


Article 644
A mandatary bears a duty to administer the mandated business with the due care of a prudent manager in compliance with the main purport of the mandate..


Article 697
(1) A person that has begun to manage a business for another person without being obligated to do so (hereinafter in this Chapter referred to as a "manager") must manage that business, in accordance with the nature of the business, in the way that best suits the interests of the principal (hereinafter referred to as "benevolent intervention in another's business").
(2) A manager must engage in benevolent intervention in another's business in accordance with the intentions of the principal if the manager knows, or is able to conjecture that intention.
Article 701
The provisions of Article 645
through Article 647
apply mutatis mutandis to the benevolent intervention in another's business.
Article 648
(1) In the absence of any special agreements, the mandatary may not claim remuneration from the mandator.
(2) If a mandatary is to receive remuneration, the mandatary may not claim this until after having performed the mandated business;provided, however, that if the remuneration is specified with reference to period, the provisions of Article 624, paragraph (2) apply mutatis mutandis.
(3) In the following cases, the mandatary may demand remuneration in proportion to the performance already completed:
(i) if the mandatary is no longer able to perform the mandated business due to any grounds not attributable to the mandator; or
(ii) if the mandate is terminated during the course of performance..


Article 665
The provisions of Articles 646 through 648, Article 649, and Article 650, paragraphs (1) and (2) apply mutatis mutandis to bailments.
Article 650
(1) If the mandatary has expended costs found to be necessary for the administration of the mandated business, the mandatary may claim reimbursement of those costs from the mandator and any interest on the same from the day the costs were expended.
(2) If the mandatary has borne any obligation found to be necessary for the administration of the mandated business, the mandatary may demand that the mandator perform the obligation on the mandatary's behalf. In such cases, if the obligation has not yet fallen due, the mandatary may require the mandator to tender reasonable security.
(3) If a mandatary incurs loss or damage that is not due to the negligence of the mandatary in order to administer the mandated business, the mandatary may claim compensation for this from the mandator..


Article 400
If the subject matter of a claim is the delivery of a specific thing, the obligor must retain the thing with the due care of a prudent manager, which is determined in light of the contract or other sources of claims and the common sense in the transaction, until the delivery..


Article 400
If the subject matter of a claim is the delivery of a specific thing, the obligor must retain the thing with the due care of a prudent manager, which is determined in light of the contract or other sources of claims and the common sense in the transaction, until the delivery..


Article 447
(1) The guarantee obligation includes interest, penalty and compensation for loss or damage in connection with the principal obligation, and all other charges secondary to that obligation.
(2) A guarantor may stipulate the amount of penalty or compensation for loss or damage with regard to the guarantor's own guarantee obligation only..


Article 298
(1) The holder of a right of retention must possess the thing retained with the due care of a prudent manager.
(2) The holder of the right of retention may not use, lease or provide as a security the thing retained unless that holder obtains the consent of the obligor;provided, however, that this does not apply to uses necessary for the preservation of that thing.
(3) If the holder of a right of retention violates the provisions of the preceding two paragraphs, the obligor may demand that the right of retention be terminated.
Article 350
The provisions of Articles 296 through 300 and those of Article 304
apply mutatis mutandis to pledges..


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 445
Even if one of the joint and several obligors is released from the obligation or the prescription period expires for one of the joint and several obligors, other joint and several obligors may exercise the right to reimbursement referred to in Article 442, paragraph (1) against that one joint and several obligor..


Article 698
If a manager engages in benevolent intervention in another's business in order to allow a principal to escape imminent danger to the principal's person, reputation, or property, the manager is not liable to compensate for damage resulting from this unless the manager has acted in bad faith or with gross negligence..


Article 457
(1) The postponement of expiry of prescription period and the renewal of prescription period due to grounds such as a request for performance in relation to the principal obligor are also effective in relation to the guarantor.
(2) A guarantor may assert against the obligee a defense that can be raised by the principal obligor.
(3) If the principal obligor has a right to set-off, right to rescind or right to cancel against the obligee, the guarantor may refuse to perform the obligation to the obligee to the extent that the principal obligor should have been released from the obligation by exercising these rights..


Article 706
If an obligor has paid money or delivered anything as performance of an obligation that has not yet fallen due, the obligor may not demand the return of the money paid or thing delivered;provided, however, that if the obligor tendered anything by mistake, the obligee must return the benefit gained as a result..


Article 463
(1) If a guarantor gives guarantee as requested by the principal obligor and performs an act for extinguishment of obligation without giving prior notice to the principal obligor, the principal obligor may assert against the guarantor any defense that could have been asserted against the obligee. In such a case, if the principal obligor asserts a set-off against the guarantor, the guarantor may request the obligee to perform the obligation which should have been extinguished due to the set-off.
(2) If a guarantor gives guarantee as requested by the principal obligor and performs an act for extinguishment of obligation in good faith because of the principal obligor's failure to notify the guarantor of the principal obligor's performance of an act for extinguishment of obligation, the guarantor may deem that the guarantor's own act for extinguishment of obligation is valid.
(3) If the principal obligor performs an act for extinguishment of obligation after the guarantor has performed an act for extinguishment of obligation, the principal obligor may deem that the guarantor's own act for extinguishment of obligation is valid, not only if the guarantor has given guarantee against the will of the principal obligor but also if the principal obligor has performed an act for extinguishment of obligation in good faith because of the guarantor's failure to notify the principal obligor of the guarantor's performance of act for extinguishment of obligation..


Article 652
The provisions of Article 620
apply mutatis mutandis to mandates.
Article 620
If a lease is cancelled, the cancellation becomes effective solely toward the future. In such a case, the cancellation does not preclude a claim for compensation for loss or damage..


Article 698
If a manager engages in benevolent intervention in another's business in order to allow a principal to escape imminent danger to the principal's person, reputation, or property, the manager is not liable to compensate for damage resulting from this unless the manager has acted in bad faith or with gross negligence..


Article 536
(1) If the performance of an obligation becomes impossible due to grounds not attributable to either party, the obligee may refuse to perform counter-performance.
(2) If the performance of an obligation becomes impossible due to grounds attributable to the obligee, the obligee may not refuse to complete counter-performance. In such a case, if the obligor benefits from being released from that obligation, the obligor must reimburse the obligee for the benefit..


Article 494
(1) In the following cases, a performer may deposit the subject matter of the performance with an official depository for the benefit of the obligee. In such a case, the claim is extinguished when the performer makes the deposit:
(i) the performer tenders the performance, and the obligee refuses to accept it; or
(ii) the obligee is unable to accept the performance.
(2) The preceding paragraph also applies if the performer is unable to ascertain the obligee;provided, however, that this does not apply if the performer is negligent in this respect.
Article 474
(1) A third party may also perform an obligation.
(2) A third party that has no legitimate interest in performing an obligation may not perform the obligation against the will of the obligor;provided, however, that this does not apply if the obligee did not know that the performance is against the will of the obligor.
(3) The third party prescribed in the preceding paragraph may not perform the obligation against the will of the obligee;provided, however, that this does not apply if the third party performs the obligation as requested by the obligor, and the obligee knew this.
(4) The provisions of the preceding three paragraphs do not apply if the nature of an obligation does not permit the performance by a third party or if a party manifests the intention to prohibit or restrict the performance by a third party..


Article 489
(1) If the obligor is liable to pay interest and expenses in addition to principal with respect to one or more obligations (if the obligor bears two or more obligations, limited to when the obligor bears these obligations requiring the same kind of payment or delivery to the same obligee), and the person that performs the obligations makes payment or delivery which is not sufficient to extinguish the obligation in its entirety must be appropriated first to expenses, and then to interest and principal, in this order.
(2) The provisions of the preceding Article apply mutatis mutandis in the case referred to in the preceding paragraph in which the person makes payment or delivery which is not sufficient to extinguish any of expenses, interest or principal in whole..


Article 28
If an administrator needs to perform an act exceeding the authority provided for in Article 103, the administrator may perform that act after obtaining the permission of the family court. The same applies if it is unclear whether the absentee is dead or alive and the administrator needs to perform an act exceeding the authority established by the absentee.
Article 103
An agent who has no specifically defined authority has the authority to perform the following acts only:
(i) acts of preservation; and
(ii) acts with the purpose of using or improving a thing or right that is the subject matter of the agency, to the extent that this does not change the nature of that thing or right..


Article 474
(1) A third party may also perform an obligation.
(2) A third party that has no legitimate interest in performing an obligation may not perform the obligation against the will of the obligor;provided, however, that this does not apply if the obligee did not know that the performance is against the will of the obligor.
(3) The third party prescribed in the preceding paragraph may not perform the obligation against the will of the obligee;provided, however, that this does not apply if the third party performs the obligation as requested by the obligor, and the obligee knew this.
(4) The provisions of the preceding three paragraphs do not apply if the nature of an obligation does not permit the performance by a third party or if a party manifests the intention to prohibit or restrict the performance by a third party..


Article 498
(1) If the property that is the subject matter of performance or the proceeds referred to in the preceding Article are deposited, the obligee may demand the return of the deposited thing.
(2) If the obligor is to effect performance in exchange for payment or delivery by the obligee, the obligee may not receive deposited thing without making that payment or delivery..


Article 299
(1) If the holder of a right of retention incurs necessary expenses with respect to the thing retained, that holder may have the owner reimburse the same.
(2) If the holder of a right of retention incurs beneficial expenses with respect to the thing retained, to the extent that there is currently an increase in value as a result of the same, that holder may have the expenses incurred or the increase in value reimbursed at the owner's choice;provided, however, that the court may, at the request of the owner, grant a reasonable period of time for the reimbursement of the same..
