Instruct: Given a legal statement, retrieve articles that support it.
Query: 
If an obligor acknowledges assignment of a claim  vis-a-vis either the assigner or the assignee, the assignee may raise the assignment as a defense against the obligor.


Article 467
(1) The assignment of a claim (including the assignment of a claim that is yet to arise) may not be duly asserted against the applicable obligor or any other third party, unless the assignor gives notice thereof to the obligor or the obligor has consented to the same.
(2) Notice or consent as referred to in the preceding paragraph may not be duly asserted against a third party other than the obligor unless the notice or the consent is made using an instrument bearing a certified date..


Article 439 (1) If one of the joint and several obligors has a claim against the obligee and invokes a set-off, the claim is extinguished for the benefit of all joint and several obligors.
(2) Until the joint and several obligor that has the claim referred to in the preceding paragraph invokes a set-off, other joint and several obligors may refuse to perform the obligation to the obligee only to the extent of that joint and several obligor's share of the obligation.


Article 511
(1) A third party obligor of a claim which has been attached may not assert sett-off as defense with any claim acquired after the attachment against the attaching obligee, but may duly assert against the same a set-off based using a claim acquired before the attachment.
(2) Notwithstanding the provisions of the preceding paragraph, if a claim acquired after the attachment has arisen from a cause that existed before the attachment, the third party obligor may use that claim for a set-off against the attaching obligee;provided, however, that this does not apply if the third party obligor acquires the claim of another person after the attachment..


Article 438 If novation takes place between one of the joint and several obligors and the obligee, the claim is extinguished for the benefit of all joint and several obligors.
Article 439 (1) If one of the joint and several obligors has a claim against the obligee and invokes a set-off, the claim is extinguished for the benefit of all joint and several obligors.
(2) Until the joint and several obligor that has the claim referred to in the preceding paragraph invokes a set-off, other joint and several obligors may refuse to perform the obligation to the obligee only to the extent of that joint and several obligor's share of the obligation.
Article 440 If there is a merger between one of the joint and several obligors and the obligee, the joint and several obligor is deemed to have performed the obligation.
Article 441 Except in cases prescribed in Articles 438, Article 439, paragraph (1), and the preceding Article, any circumstances which have arisen with respect to one of the joint and several obligors is not effective in relation to other joint and several obligors; provided, however, that if the obligee and one of the other joint and several obligors manifest a different intention, their intention prevails with respect to the effect in relation to the remaining other joint and several obligees.


Article 443 (1) If one of the joint and several obligors performs the obligation or otherwise obtains a common discharge in exchange for that obligor's own property, while knowing the existence of other joint and several obligors but without giving notice of the common discharge to the other joint and several obligors, another joint and several obligor has a defense that can be duly asserted against the obligee, the other joint and several obligor may duly assert that defense against the joint and several obligor that obtained the discharge to the extent of the other obligor's share of the obligation. In such a case, if the other joint and several obligor duly asserts a set-off as defense against the joint and several obligor that obtained the discharge, the joint and several obligor may request the obligee to perform the obligation which should have been extinguished due to set-off.


Article 492
Upon tendering the performance, the obligor is relieved from any and all responsibilities which may arise from the non-performance of the obligation..


Article 254
A claim that one of the co-owners holds against other co-owners with respect to the property in co-ownership may be exercised against their specific successors..


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 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 520
If a claim and obligation becomes vested in the same person, such claim is extinguished;provided, however, that this does not apply if such a claim is the subject matter of the right of a third party..


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 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 485
Unless a particular intention is manifested with respect to the expenses of performance, those expenses are borne by the obligor;provided, however, that if the obligee caused the expenses of performance to increase by relocating the domicile thereof or taking any other act, the amount of increase due to this is borne by the obligee..


Article 520
If a claim and obligation becomes vested in the same person, such claim is extinguished;provided, however, that this does not apply if such a claim is the subject matter of the right of a third party..


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 496
(1) As long as the obligee does not accept the deposit, or the judgment which pronounces that the deposit is effective does not become final and binding, the performer may recover the deposited thingy. In such case, it is deemed that no deposit has been effected.
(2) The provisions of the preceding paragraph do not apply in cases any pledge or mortgage has been extinguished due to the deposit..


Article 412
(1) If a fixed due date is assigned to the performance of an obligation, the obligor is liable for delay from the time that due date arrives.
(2) If an uncertain due date is assigned to the performance of an obligation, the obligor is liable for delay from the time when the obligor receives the request for performance after the due date arrives or the time when the obligor becomes aware of the arrival of that due date, whichever comes earlier.
(3) If no time limit is assigned to the performance of an obligation, the obligor is liable for delay from the time the obligor receives the request for performance..


Article 537
(1) If one of the parties promises in a contract to render a certain performance to a third party, the third party has the right to claim that performance directly from the obligor.
(2) The validity of the contract referred to in the preceding paragraph is not impaired even if a third party does not exist or a third party is not specified at the time of its formation.
(3) In the case referred to in paragraph (1), rights of the third party accrue when the third party has manifested intention of availing of the benefit of the contract under that paragraph to the obligor.
Article 538
(1) After rights of the third party have accrued pursuant to the provisions of the preceding Article, the parties may not modify or extinguish those rights.
(2) If, after rights of the third party accrue pursuant to the provisions of the preceding Article, the obligor does not perform the obligation to the third party, the other party to the contract referred to in paragraph (1) of that Article may not cancel the contract without the consent of the third party..


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 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 462
(1) The provisions of Article 459-2, paragraph (1) apply mutatis mutandis if a person, that has given guarantee without the request of the principal obligor, performs an act for extinguishment of obligation.
(2) A person that has become a guarantor against the will of the principal obligor has the right to reimbursement only to the extent currently enriched.In this case, if the principal obligor asserts to have grounds for set-off against the obligee prior to the day of the demand for reimbursement, the guarantor may demand that the obligee perform the obligation which would have been extinguished by that set-off.
(3) The provisions of Article 459-2, paragraph (3) apply mutatis mutandis to the exercise of the right to reimbursement if the guarantor referred to in the preceding two paragraphs performs an act for extinguishment of obligation before the due date of the principal obligation..


Article 371
If there is a default with respect to a claim secured by a mortgage, the mortgage extends to the fruits of the mortgaged immovables derived after the default..


Article 306
A person that has a claim arising from the causes set forth below has a statutory lien over the entire assets of the obligor:
(i) expenses for the common benefit;
(ii) an employer-employee relationship;
(iii) funeral expenses; or
(iv) the supply of daily necessaries.
Article 308
Statutory liens for employer-employee relationships exist with respect to salaries and other claims that arise from the employer-employee relationship between the obligor and the employee..


Article 477
Performance made by making payment into the obligee's account for deposits becomes effective when the obligee acquires a right to demand the refund of the amount paid, against the obligor of the claim to be paid from deposits.
Article 475
If a person effecting performance has delivered a thing owned by another person in performance of the obligation, the person so effecting performance may not recover that thing without effecting valid performance de novo..


Article 371
If there is a default with respect to a claim secured by a mortgage, the mortgage extends to the fruits of the mortgaged immovables derived after the default..
