Novation of a Contract or Debt: When Is the Old Obligation Replaced?

Quick Answer: Unlike payment, novation extinguishes an existing obligation by replacing it with a new one, changing its object or principal conditions, substituting the debtor, or subrogating a new creditor. Under Articles 1291–1292, novation is never presumed: it must be expressly declared or the old and new obligations must be incompatible in every material respect.

Types of Novation

Type	Change
Objective	Object or principal conditions are replaced
Subjective—debtor	A new debtor replaces the original debtor
Subjective—creditor	A new creditor is subrogated to the original rights
Mixed	Parties and principal terms change together

A Modification Is Not Automatically Novation

Changing an interest rate, schedule, security or minor condition may merely modify the existing obligation. Mutual debts may instead be reduced through compensation or setoff without replacing either obligation. Implied novation requires incompatibility so complete that the old and new obligations cannot stand together.

Can a New Debtor Replace the Old One?

Article 1293 requires creditor consent to substitution. It may occur even without the original debtor’s knowledge or against that debtor’s will, but the legal consequences differ. An arrangement only between the two debtors does not release the original debtor without the creditor’s acceptance. If several debtors signed, determine first whether the undertaking is joint or solidary.

What Happens to Guarantees and Security?

Article 1296 generally extinguishes accessory obligations with the principal obligation, except insofar as they benefit third persons who did not consent. Documents should state whether mortgages, pledges, guaranties and penalties survive.

Evidence Checklist

Original contract and every amendment
New agreement and release language
Creditor consent to debtor substitution
Comparison of principal terms
Payment and performance after the change
Security and guarantor consent
Accounting showing whether the old balance was closed

Practical Next Steps

Identify the old enforceable obligation.
Mark every changed party and principal term.
State expressly whether the old obligation is extinguished or merely amended.
Obtain creditor and affected guarantor consent where required.
Address security, interest, defenses and accrued rights.

Frequently Asked Questions

Does restructuring a loan create novation?

Not necessarily. A new schedule or rate may only modify the original debt unless express extinguishment or complete incompatibility is shown.

Can novation be oral?

It may be express or implied, but applicable form rules and the strong proof required against presumption make clear writing important.

Does accepting payments from a new person release the old debtor?

Not automatically. Creditor consent to substitution and the complete circumstances must be established.

Can a void obligation be novated?

Article 1298 generally treats novation as void if the original obligation was void, subject to its stated exceptions.

Compare contract validity and third-party payment.

Primary Legal Sources

Legal verification date: September 15, 2026. This guide provides general legal information, not advice for a specific transaction or dispute.