Banking Law and Guardianship Account Management in Spain

In Spain, guardianship account management concerns the way bank accounts and other financial assets are managed when an individual requires another person to provide legally recognised support. Since Law 8/2021, Spanish law has substantially changed its approach to adults with disabilities: the system is now centred on support for the exercise of legal capacity, respect for the person's autonomy, and their will, wishes and preferences, rather than broad substitution of decision-making.

For banking purposes, the principal mechanisms include voluntary support measures, powers of attorney, de facto guardianship (guarda de hecho), curatorship (curatela) and, where necessary, judicially authorised representative action. Traditional tutela remains especially relevant to minors rather than serving as the ordinary mechanism for adults with disabilities.

1. Legal Framework

The principal legislation includes:

• Spanish Civil Code (Código Civil);
• Law 8/2021 of 2 June;
• Voluntary Jurisdiction Act;
• Civil Procedure legislation;
• banking-contract rules;
• consumer-protection legislation;
• anti-money-laundering requirements; and
• the particular judicial decision or voluntary support instrument governing the person's affairs.

Article 268 of the Civil Code requires judicial support measures to be proportionate to the person's needs, to respect maximum autonomy and to take account of the person's will, wishes and preferences. Judicial measures must also be periodically reviewed.

This has major consequences for banks.

A bank should not simply assume that because a customer has a disability, another person automatically controls the customer's money.

2. Ordinary Bank-Account Management

As a general rule, an adult manages their own bank account.

The Banco de España explains that an adult—and an emancipated person from age 16—normally has capacity to open and manage an account. Where support is required, the extent of another person's authority depends upon the applicable support mechanism.

Therefore:

Disability ≠ automatic loss of control over the bank account.

Instead, the question is:

What support, if any, does this particular customer require for this particular transaction?

3. De Facto Guardian — Guardador de Hecho

The guarda de hecho has become particularly important for ordinary banking.

It can exist where a relative or another trusted person actually assists the individual without having been formally appointed as a judicial curator.

According to the Banco de España's 2026 guidance, a de facto guardian can, in appropriate circumstances, assist with ordinary banking operations such as opening an account, arranging payment of salary or pension into it, setting up ordinary payments and making small withdrawals for basic needs.

This does not create unlimited authority over the person's property.

The greater the legal or economic importance of the transaction, the more important it becomes to determine whether formal authority or judicial approval is required.

4. Curatorship — Curatela

Where informal or voluntary support is insufficient, a court may establish a curatorship.

Under Article 269 of the Civil Code, the court must identify precisely which acts require the curator's assistance.

Representation is exceptional.

A curator should therefore not automatically receive unlimited power over every bank account.

For example, a judgment might establish assistance for:

• investments;
• substantial withdrawals;
• borrowing;
• disposition of significant assets;

while leaving the individual able to conduct ordinary daily banking personally.

The bank must consequently examine the actual scope of the judicial measure rather than treating “curatorship” as a general financial prohibition.

5. Representative Curatorship

Article 269 permits representative powers only exceptionally, where they are indispensable considering the person's circumstances.

Suppose a judgment provides that the curator represents the customer for transactions exceeding a specified scope.

A bank may then need the curator's participation for those transactions.

But it would be incorrect to conclude automatically that the curator controls every transaction.

This principle was reinforced by post-2021 Supreme Court jurisprudence requiring support measures to correspond to the person's actual support requirements.

6. Respect for the Account Holder's Preferences

Article 282 establishes important duties for curators.

The curator must exercise due diligence, maintain appropriate personal contact, respect the person's will, wishes and preferences, assist them in exercising legal capacity, and encourage development of their decision-making abilities.

Therefore, managing someone's account under a support arrangement should not ordinarily mean:

“The curator decides what is best.”

The legal approach is closer to:

“The curator provides the support required for the person to exercise their own legal capacity.”

That distinction is fundamental to the post-2021 system.

7. Bank's Responsibility

Banks face two competing responsibilities.

They must protect customers against unauthorised transactions, financial abuse and fraud.

At the same time, they should not unnecessarily prevent a customer with a disability from controlling their own finances.

This makes documentation particularly important.

A bank may need to identify whether the person assisting the customer acts through:

• power of attorney;
• preventive power;
• guarda de hecho;
• curatorship;
• representative curatorship;
• judicial authorisation.

The authority available under one arrangement should not automatically be assumed under another.

8. Opening Accounts

Account opening provides a useful example.

A person who can operate their financial affairs personally should ordinarily remain the account holder exercising their own rights.

Where assistance is necessary, an appropriate support person may participate.

The Banco de España has specifically recognised that de facto guardianship can facilitate basic banking activities without requiring formal judicial appointment for every transaction of limited economic significance.

Banks still retain their normal customer-identification and regulatory obligations.

9. Withdrawals and Payments

Routine withdrawals require different treatment from major asset transactions.

For example:

€40 for groceries

is legally and economically different from:

€150,000 withdrawal to purchase property.

The Banco de España identifies small withdrawals for basic needs among the kinds of ordinary activities that a de facto guardian may facilitate.

Major transactions may require examination of the governing support arrangement and, in some circumstances, judicial authorisation.

10. Investments

Investment management can be more legally sensitive.

A curator cannot simply assume unrestricted authority to invest a person's savings.

Relevant questions include:

1. Does the person make the investment decision independently?
2. Is assistance required?
3. Does the judicial order cover investment decisions?
4. Does the curator possess representative authority?
5. Does the transaction require additional judicial approval?

The answer depends on the support instrument and transaction concerned.

11. Inventory and Protection of Financial Assets

Where a curator has representative powers, Article 285 requires an inventory of the supported person's assets within 60 days after taking possession of the office.

The legislation also provides that money, securities, valuable objects or documents that should not remain in the curator's possession may be deposited in an appropriate establishment.

Bank accounts, deposits and investments can therefore become important components of the inventory.

12. Supervision and Accounting

The court can establish controls to protect against:

• abuse;
• conflicts of interest;
• undue influence.

It may also require information concerning the supported person's personal or financial situation. The Public Prosecutor may request information necessary to ensure proper operation of the curatorship.

When the curatorship terminates, the curator must generally provide a justified final account of administration within three months, subject to statutory extension for good reason.

This creates accountability for money handled through bank accounts.

13. Liability for Mismanagement

A curator cannot use the supported person's bank account as though the money belonged to the curator.

Article 294 provides that the curator is responsible for damage caused through fault or negligence. The statutory action relating to this liability has a three-year limitation period calculated from the final accounting.

Accordingly, unexplained withdrawals, inappropriate investments or negligent administration can potentially produce liability.

Important Spanish Case Law

The most useful cases are not necessarily disputes directly between banks and guardians. Many are Supreme Court decisions defining the scope of support, curatorship, autonomy and representative authority. Those principles determine how banking authority should be understood.

Case 1 — Supreme Court Judgment 589/2021

This became one of the foundational Supreme Court decisions applying the new Law 8/2021 framework.

The Court addressed how support measures should operate after Spain moved away from the traditional model of judicial incapacitation.

Banking significance

The principle is that financial support measures should be tailored to the individual.

A court should not simply remove someone's financial autonomy because support is considered useful.

For banks, the practical consequence is:

read the support measure → determine its precise scope → apply it to the particular transaction.

Case 2 — Supreme Court Judgment 964/2022

This line of jurisprudence further developed the post-reform system of support.

The Supreme Court emphasised the importance of tailoring measures to the actual circumstances and requirements of the individual.

Banking significance

A bank cannot safely treat every support order as equivalent to total financial representation.

Someone may need support for complex investments while remaining able to operate an ordinary current account.

Case 3 — Supreme Court Judgment 854/2024

Supreme Court, Civil Chamber, 12 June 2024 — ECLI:ES:TS:2024:3430

The Supreme Court considered whether the content and scope of an imposed curatorship corresponded to the actual support needs identified in the proceedings.

It concluded that support measures must maintain the required connection with those needs and the requirements of Article 268.

Banking significance

This provides an important proportionality principle.

If the identified problem concerns one particular area of decision-making, that does not automatically justify restricting unrelated financial activities.

Case 4 — Supreme Court Judgment 1143/2024

Supreme Court, Civil Chamber, 18 September 2024 — ECLI:ES:TS:2024:4400

This case concerned judicial support and curatorship under the post-Law 8/2021 framework.

It forms part of the Supreme Court jurisprudence requiring courts to determine support arrangements under the newer autonomy-centred legal model.

Banking significance

The existence of a disability should not itself answer the question of who can conduct a banking transaction.

The relevant question remains what support is legally established and required for that particular act.

Case 5 — Supreme Court Judgment 1383/2024

Supreme Court, Civil Chamber, 23 October 2024 — ECLI:ES:TS:2024:5197

This decision is especially useful because it addressed the appropriateness of representative curatorship.

The Supreme Court partially allowed the appeal concerning representative support.

Banking significance

Representation should not become the automatic default.

There is a major legal difference between:

Assistance: the customer decides with support.

and

Representation: the curator legally acts for the customer within the authorised area.

Banks need to distinguish between these models.

Case 6 — Supreme Court Judgment 1449/2024

Supreme Court, Plenary Civil Chamber, 4 November 2024 — ECLI:ES:TS:2024:5267

This important plenary judgment considered a situation in which a person had previously granted a general power containing a provision intended to survive disability.

The Court examined the relationship between voluntary support measures and subsequently imposed judicial measures.

Article 255 gives importance to voluntary support arrangements. Judicial measures are subsidiary where voluntary arrangements or adequate de facto support already provide sufficient assistance.

Banking significance

This is highly relevant to bank-account mandates and powers of attorney.

Before assuming that judicial curatorship is necessary for financial administration, it may be necessary to determine whether an effective voluntary arrangement already provides sufficient support.

Case 7 — Continuing Supreme Court Doctrine on Proportionality

The broader Supreme Court jurisprudence following Law 8/2021 establishes a consistent structural principle:

support measures must be individualised rather than standardised.

The Civil Code itself now requires proportionality, maximum autonomy and attention to the person's will, wishes and preferences.

For banking, this means that institutions should avoid translating a support arrangement into broader account restrictions than the governing legal instrument actually requires.

14. Practical Banking Example

Suppose María has €60,000 in a Spanish bank.

A court establishes curatorship but provides that assistance is required for:

• investments above €10,000;
• borrowing;
• disposal of significant assets.

It does not give the curator general representative authority.

María wants to withdraw €200 herself.

The existence of curatorship does not automatically mean:

“Transaction denied because María has a curator.”

Instead, the bank should determine whether this transaction falls within the acts for which assistance or representation is required.

Now suppose María wants to invest €30,000.

That transaction falls within the hypothetical support measure.

The required curator involvement would therefore need to be considered.

15. Conflict of Interest

Special protection becomes necessary where the curator's interests conflict with those of the supported person.

Article 283 provides for appointment of a judicial defender (defensor judicial) where the curator is temporarily unable to act in a particular matter or an occasional conflict of interest exists.

For example, if a curator attempts to transfer a substantial amount from the supported person's account for a transaction personally benefiting the curator, the conflict cannot simply be ignored.

16. Banking Practice After Law 8/2021

The practical banking system continues to adapt to the reform.

In 2023, the Banco de España, Prosecutor General's Office and banking associations AEB, CECA and UNACC established cooperation concerning the banking autonomy of people with disabilities. In March 2026, Banco de España described guidance developed to help de facto guardians perform banking activities while maintaining legal certainty for financial institutions.

This development illustrates the direction of Spanish banking practice:

protection from abuse without unnecessary removal of financial autonomy.

17. Main Principles Derived from the Cases

At least six important principles emerge from Spanish legislation and Supreme Court jurisprudence:

1. Maximum autonomy: the account holder should retain as much independent financial decision-making as possible.

2. Proportionality: support must correspond to demonstrated needs.

3. Individualisation: courts should specify the transactions for which support is necessary.

4. Representation is exceptional: a curator does not automatically become a complete substitute financial decision-maker.

5. Voluntary arrangements matter: powers and other voluntary support measures may sometimes make additional judicial intervention unnecessary.

6. Will, wishes and preferences matter: financial administration should respect the supported person's own decisions within the legal framework.

7. Accountability remains essential: representative curators can face inventory, supervision, accounting and liability obligations.

Conclusion

Banking Law and Guardianship Account Management in Spain has changed significantly following Law 8/2021. The modern system is no longer built around broadly declaring an adult legally incapable and transferring control of their property to another person. Instead, it focuses on providing the particular support necessary for the individual to exercise legal capacity.

For banks, the central rule can be expressed as:

customer autonomy → determine actual support needs → identify the legal support mechanism → examine its precise scope → permit supported decision-making → use representation only where legally authorised → maintain safeguards against abuse.

The jurisprudence represented by STS 589/2021, STS 964/2022, STS 854/2024, STS 1143/2024, STS 1383/2024 and STS 1449/2024 demonstrates the broader direction of Spanish law: curatorship and other support arrangements must be tailored to the individual rather than automatically eliminating control over bank accounts or other financial affairs.