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Preventive power of attorney: what it is and why it is a key tool

marzo 2026

In professional practice, it is common to encounter unforeseen situations—such as illness, accident or cognitive decline—that prevent a person from managing their personal and financial affairs independently. In such scenarios, the preventive power of attorney serves as a particularly effective legal tool for anticipating and organising decision-making, thereby avoiding complex and costly legal proceedings.

What is the preventive power of attorney?

It is a notarised power of attorney whereby a person appoints another to act on their behalf, with the particularity that it will remain valid or come into effect if the grantor loses their capacity.

In Spanish law, this concept is primarily based on Articles 255 and 1732 of the Civil Code, in relation to the regulations introduced following Law 8/2021, which reforms support for people with disabilities in the exercise of their legal capacity, reinforcing autonomy of will and prioritising voluntary measures over judicial ones.

It can be structured in two ways:

  • Immediate effect: this is a general power of attorney that takes effect upon signature, with the particularity that it does not expire if the grantor becomes incapacitated.
  • Deferred effect: it only comes into force once the grantor’s incapacity has been proven. In this regard, it is necessary to specify how the lack of incapacity is to be proven, seeking alternatives to the usual court declaration.

Main advantages:

  • Autonomy of will: it allows the grantor to decide who will manage their affairs and under what conditions.
  • Avoids legal proceedings: reduces costs, timeframes and emotional strain by avoiding court-ordered support measures.
  • Continuity of management: ensures there are no disruptions in banking, asset-related or administrative matters.
  • Flexibility and personalisation: adapts to the client’s needs, allowing limits, controls and conditions to be set.
  • Conflict prevention: reduces the risk of family disputes by leaving everything clearly defined.

 

Key points

A preventive power of attorney can be modified or revoked at any time and must be registered at the Civil Registry to ensure its validity.

Conclusion

The preventive power of attorney is an essential tool for personal and estate planning, which we recommend to our clients, particularly when they are in the process of succession planning. It allows for anticipating situations of vulnerability, protecting the client’s interests, and avoiding more rigid judicial solutions, thereby providing security and peace of mind both to the individual and to their family environment.