Substitution of heirs is the appointment in a will of a second heir to take the inheritance if the first heir dies before the testator, cannot accept, or refuses it. The most common is simple or vulgar substitution, naming an alternate. Fideicommissary substitution is where the first heir is charged to preserve the inheritance and transmit it to a second heir; it is valid only if the substitute is one degree from the first heir and both live at the time of the testator's death, and it must not burden the legitime. Substitution lets a testator plan for contingencies among their heirs.
What happens if the person you name in your will dies before you, or refuses the inheritance? Without a backup plan, that share may not go where you intended. The Civil Code’s rules on substitution of heirs let a testator name alternates.
What Substitution Is
Substitution is the appointment of another heir so that they may enter into the inheritance in default of the heir originally instituted. It is a tool of estate planning that lets the testator anticipate contingencies — the named heir predeceasing them, being incapacitated to inherit, or repudiating the inheritance.
Simple (Vulgar) Substitution
The most common and straightforward is simple or vulgar substitution: the testator designates a substitute heir to take the inheritance if the first heir predeceases the testator, cannot accept, or renounces it. For example, “I give this to my brother A; but if he does not or cannot accept, then to my sister B.” Unless the testator provides otherwise, a substitution covering these cases is understood to cover all three. Two or more persons may be substituted for one, and one for two or more.
Fideicommissary Substitution
A more complex and restricted form is fideicommissary substitution. Here, the first heir (fiduciary) is instituted with the obligation to preserve and transmit the inheritance, in whole or in part, to a second heir. In effect, the first heir enjoys the property for a time, then passes it on to the second. Because this can tie up property across generations, the law imposes strict limits:
- The substitution must not go beyond one degree from the heir originally instituted — understood to mean one transfer, so the second heir must be one degree (such as a child) from the first;
- The fiduciary and the fideicommissary (both heirs) must be living at the time of the testator’s death; and
- The obligation to preserve and transmit must be clearly imposed, and it must not burden the legitime of compulsory heirs.
A fideicommissary substitution that violates these limits is void as to the offending part, and interpretations that would perpetually tie up property are not allowed.
What Substitution Cannot Do
Substitution operates within the bounds of compulsory succession. It cannot be used to deprive compulsory heirs of their legitimes or to impose conditions on the legitime. It works chiefly on the free portion and on voluntary heirs and legacies. Also, certain prohibited substitutions and dispositions that improperly restrain the property are not permitted.
Substitution vs. Representation and Accretion
Substitution should be told apart from two related concepts: representation (where descendants step into the place of a deceased heir by law, mainly in intestacy and for the legitime) and accretion (where a vacant share accrues to co-heirs). Substitution is a testamentary designation by the testator; representation and accretion operate by law. Where the will provides a substitute, that generally takes precedence over accretion for the affected share.
Practical Advice
- When making a will, consider naming substitute (backup) heirs for your voluntary dispositions, so a share does not fail if your first choice cannot take it.
- Use fideicommissary substitution cautiously and within its strict limits — and never to burden a legitime.
- Because substitution interacts with legitimes, representation, and accretion, have the will drafted carefully to achieve your real intent.
Frequently Asked Questions
What is substitution of heirs? Naming a second heir in a will to take the inheritance if the first heir predeceases the testator, cannot accept, or refuses it. It lets a testator plan for contingencies.
What is simple or vulgar substitution? The most common form: designating a substitute to take the inheritance if the first heir dies before the testator, cannot accept, or renounces it. Unless stated otherwise, it covers all three cases.
What is fideicommissary substitution? Where the first heir is charged to preserve and transmit the inheritance to a second heir. It is valid only if the substitute is one degree from the first heir, both are living at the testator's death, and it does not burden the legitime.
Can substitution reduce a compulsory heir's legitime? No. Substitution cannot deprive compulsory heirs of their legitimes or impose conditions on them. It operates chiefly on the free portion and on voluntary heirs and legacies.
This commentary is for general informational purposes only and does not constitute legal advice. For guidance specific to your situation, please consult a licensed attorney.
If you want a will that plans for contingencies among your heirs, our firm can draft it properly. You may reach us via Viber or WhatsApp, call us at 0995 433 5550, or send an email to vivasnobles@gmail.com. We look forward to hearing from you.