Short answer. You can defend it by proving the note was returned because the debt was actually paid, not given away as a gift. Article 1271 lets the debtor or his heirs uphold the waiver against a claim that it was inofficious, precisely by showing it reflected genuine payment rather than a disguised gift reducing the estate available to compulsory heirs.

What the law says

The delivery of a private document evidencing a credit, made voluntarily by the creditor to the debtor, implies the renunciation of the action which the former had against the latter.

Civil Code, Article 1271 — Delivery of the Credit Document. Read the full provision →

What the law says

If in order to nullify this waiver it should be claimed to be inofficious, the debtor and his heirs may uphold it by proving that the delivery of the document was made in virtue of payment of the debt.

Civil Code, Article 1271 — Delivery of the Credit Document. Read the full provision →

Returning a Note Can Look Like Forgiveness

When a creditor voluntarily hands a debtor back the private document evidencing the debt, a promissory note, an IOU, a signed acknowledgment, Article 1271 treats that act as implying that the creditor renounced the right to collect. The law presumes condonation from the physical act itself: if the creditor no longer holds the paper proving the debt, the natural inference is that the debt is gone, without needing any separate written waiver or formal deed of forgiveness.

Why Heirs Might Contest It

Compulsory heirs are entitled to a legitime that cannot be impaired by gratuitous transfers the deceased made during his lifetime. If forgiving a substantial debt functioned as an uncompensated gift to the debtor, heirs may argue it was inofficious, that it ate into the portion the law reserves for them, and seek to have it reduced or annulled to protect their share.

The Debtor's Defense: Prove It Was Payment, Not a Gift

Article 1271 gives the debtor and his heirs a specific way to defeat that challenge: show that the document was handed back because the debt had actually been paid, not because the creditor chose to give it up for nothing. Receipts, bank records, witnesses to the payment, or the surrounding circumstances of the handover can establish that the return was simply an acknowledgment of settlement, not a disguised donation.

What This Means in Practice

If you find yourself defending a returned note years later, gather whatever evidence exists that value actually changed hands at the time: proof of a bank transfer, a cash payment witnessed by others, or correspondence referring to the debt as settled. The stronger that evidence, the harder it becomes for heirs to recharacterize the transaction as an inofficious gift rather than ordinary payment. It also helps to establish the debt's value relative to the estate as a whole, since heirs must generally show the alleged donation was substantial enough to actually impair their legitime before a court even reaches whether it was a gift at all. Where the paper trail is thin, testimony from people who witnessed the transaction or the later payment can carry real weight.

Cases citing this provision

These Supreme Court decisions cite the provision above. We list them so you can read them yourself; the summaries of what each decided are not ours to give.

Related provisions

Note. Statute text quoted on this page is reproduced from the official enactment and is linked to the full provision. The explanation around it is general legal information from Vivas & Nobles Law Office, not legal advice. Whether it applies to your situation depends on facts only a lawyer reviewing them can assess.