Unilateral mortgage accepted by Tax Authority: you need its consent to cancel it

Key data

If you have a debt with the Tax Authority guaranteed by a unilateral mortgage registered in the Property Registry, and that mortgage has already been formally accepted by the AEAT, you cannot cancel it without the express approval of the creditor. The General Directorate of Legal Security and Public Faith (DGSJ) has confirmed this in its resolution of June 4, 2026, published on October 14, 2026, by dismissing the appeal of a debtor whose cancellation was suspended by the registrar of San Fernando no. 1.

This pronouncement closes the door to a strategy that some tax debtors were attempting: canceling the unilateral mortgage without involving the Tax Authority, taking advantage of the simplified mechanism of the Mortgage Law. The resolution makes clear that this path only exists in a very specific circumstance.

What does this regulation establish?

The DGSJ resolution sets two fundamental rules that should be well understood before attempting any registry operation on a unilateral mortgage in favor of the AEAT:

The key is acceptance. Once the AEAT formally accepts the mortgage, it becomes fully consolidated as a real guarantee. From that moment on, the debtor loses the ability to cancel it on their own.

The resolution also addresses a frequent argument from debtors: the discrepancy in the liquidation number between the deed of constitution and the acceptance document. The DGSJ expressly rejects this: if the remaining identifying elements match completely, that discrepancy does not constitute a vitiating defect. To challenge the validity of the administrative act of acceptance, the debtor must resort to the administrative or administrative-contentious route, not the Property Registry.

Economic and operational impact

The practical consequences of this resolution are direct and costly if not handled correctly:

• Cancellation suspended in the Registry: The registrar can—and must—deny cancellation if the mortgage is already accepted and the Tax Authority's consent is not provided. This blocks any real estate transaction on the property (sale, refinancing, new mortgage).
• Duplicate notarial and registry costs: If cancellation is attempted through the incorrect route and suspended, the debtor bears the costs of the first failed attempt and must repeat the process with the Tax Authority's consent deed.
• Total dependence on the AEAT: To obtain consent, the debtor must have satisfied the tax debt that motivated the mortgage. The Tax Authority will not grant consent if there is outstanding debt.
• Challenge only through administrative route: If the debtor believes that the AEAT's acceptance is invalid (for example, due to the discrepancy in the liquidation number), they must initiate an administrative or administrative-contentious procedure. The Registry is not the route.

Who does it affect?

• Tax debtors who constituted a unilateral mortgage in favor of the AEAT as a guarantee of a tax debt and who now want to cancel it.
• Property owners with mortgage charges in favor of the Tax Authority who wish to sell, refinance, or release the property.
• Tax advisors and tax lawyers who manage debt regularization processes with the AEAT that include mortgage guarantees.
• Notaries and registrars who process cancellation deeds of unilateral mortgages in favor of public bodies.
• Property managers and administrators who advise owners with registry charges of tax origin.

Practical example

A company once constituted a unilateral mortgage on an industrial property in favor of the AEAT to guarantee the payment of a tax debt in installments. The AEAT formally accepted the mortgage through the corresponding administrative act, which was registered in the Property Registry.

Years later, the company has settled the debt and wants to sell the property. To do this, it needs to cancel the mortgage. The manager attempts to cancel it through article 141 of the Mortgage Law (without creditor consent), arguing that there is a discrepancy in the liquidation number between the deed and the acceptance document.

The registrar suspends the cancellation. The DGSJ confirms the suspension: since the mortgage was already accepted, only article 82 of the Mortgage Law applies, and the express consent of the AEAT in a public deed is required. The discrepancy in the liquidation number does not invalidate the acceptance. The company must request the cancellation deed from the AEAT, with the additional costs and timelines that this entails.

What should companies do now?

1. Review the Property Registry: Check if you have unilateral mortgages in favor of the AEAT registered on your properties and if there is a note of acceptance. This data is decisive in determining which cancellation route is applicable.
2. Verify the status of the tax debt: Before initiating any cancellation management, confirm with the AEAT that the guaranteed debt is completely satisfied. Without the debt settled, no consent is possible.
3. Request consent from the AEAT through the correct route: If the mortgage is accepted, initiate the administrative procedure with the AEAT to obtain the public deed of cancellation. Do not attempt the article 141 LH route if there is evidence of acceptance.
4. Challenge acceptance only through administrative route: If you believe that the AEAT's act of acceptance is invalid (due to discrepancies or other reasons), resort to the administrative or administrative-contentious route. The Property Registry cannot resolve that matter.
5. Coordinate with notary and registrar before executing deeds: Inform your notary of the exact registry status of the mortgage to avoid cancellation deeds that are later suspended, with the double cost that this entails.

Official source

Consult complete regulation in official source

Notice: This article is for informational purposes only and does not constitute legal advice. For specific decisions, consult a qualified professional. Source: https://www.boe.es/diario_boe/txt.php?id=BOE-A-2026-21414