El certificado de últimas voluntades no acredita el interés legítimo.

In Spain, certificado de últimas voluntades is a specific legal document. It does not contain the will itself. Instead, it states whether a deceased person made a will, and if so, before which notary and on what date.

So this is a fixed legal expression, not just a casual phrase meaning certificate of last wishes.

Because últimas voluntades is a set expression in legal Spanish meaning last wishes or testamentary wishes. Spanish often uses the plural here, just as English commonly says last wishes rather than last wills in ordinary language.

In this phrase:

• últimas = last
• voluntades = wishes / intentions / legal wishes

Even though English often talks about a will in the singular, Spanish legal terminology keeps the plural phrase últimas voluntades.

Here de links the noun certificado to what kind of certificate it is.

So:

• certificado = certificate
• de últimas voluntades = of last wishes / relating to last wishes

This is a very common structure in Spanish:

• libro de historia = history book
• tarjeta de crédito = credit card
• certificado de nacimiento = birth certificate

So de often works like English of or sometimes like an adjective-noun relationship.

In this sentence, acredita is a formal/legal verb meaning something like:

• proves
• establishes
• certifies
• shows officially

It comes from acreditar.

In everyday Spanish, learners often first meet verbs like probar or demostrar for to prove, but acreditar is especially common in administrative and legal contexts. It suggests that a document serves as valid evidence.

So here no acredita means the document does not serve as proof of or does not establish the legitimate interest.

Because Spanish usually uses the simple present for general statements, definitions, and legal facts.

So:

• no acredita = does not prove / does not establish

This sounds natural in formal Spanish because it states a general rule about the document.

Using no está acreditando would mean is not proving right now, which sounds much more temporary or tied to a specific ongoing situation. That is usually not what legal wording wants.

Spanish uses definite articles more often than English, especially in formal writing.

Here:

• El certificado... refers to a specific type of legal document
• el interés legítimo refers to a specific legal concept

So the articles help present both as identifiable, defined things.

A rough breakdown:

• El certificado = the certificate
• el interés legítimo = the legitimate interest

In legal or administrative Spanish, this kind of phrasing is very common.

Interés legítimo is a legal expression. It does not just mean a good reason in a casual sense.

It refers to a legally recognized interest or justification for requesting information, documents, or access. In other words, the person must have a valid legal connection to the matter.

So this is another fixed formal phrase, much like legal English uses expressions such as legitimate interest, legal standing, or lawful interest, depending on context.

In Spanish, most descriptive adjectives normally come after the noun.

So:

• interés legítimo = legitimate interest

That is the standard order. Putting the adjective before the noun is possible in some cases, but it often changes the tone, emphasis, or meaning. In legal expressions, the normal and expected order is usually noun + adjective.

So interés legítimo sounds natural and standard, while legítimo interés would sound unusual here.

It is both grammatically a normal noun + adjective combination and practically a fixed legal phrase.

That matters because learners might try to interpret it too literally word by word. In real Spanish legal usage, interés legítimo is a recognized concept, so it often behaves like a technical term.

That is why this sentence sounds especially formal and official.

Because acreditar can take a direct object directly.

Here the structure is:

• El certificado = subject
• no acredita = verb
• el interés legítimo = direct object

So the grammar is simply:

Something + acredita + something

For example:

• Este documento acredita la identidad.
• El contrato acredita la relación laboral.

English often needs extra wording like proves that someone has..., but Spanish can say it more directly.

You can understand it word by word, but a fully literal translation may sound unnatural in English.

Word by word:

• El = the
• certificado = certificate
• de últimas voluntades = of last wishes
• no acredita = does not prove / does not certify
• el interés legítimo = the legitimate interest

But because this is legal Spanish, a natural English translation often needs to sound more legal and less literal. For example, the idea is that this certificate is not sufficient proof of legitimate interest.

So literal translation helps with grammar, but the best English version may be less word-for-word.

Yes. Very much so.

Clues that it is formal/legal Spanish:

• certificado
• acredita
• interés legítimo

In everyday conversation, people would often use simpler verbs and less technical wording. But official notices, forms, and legal explanations often use this kind of compressed formal style.

So as a learner, it is useful to recognize that this is not casual Spanish but administrative/legal register.

The written accents show you where the stress falls:

• últimas → stress on ÚL
• interés → stress on RÉS
• legítimo → stress on GÍ

So approximately:

• ÚL-ti-mas
• in-te-RÉS
• le-GÍ-ti-mo

The accent marks are important because they show irregular stress. Without them, you would pronounce the words differently.

Because el interés legítimo is not a person.

Spanish uses the personal a mainly when the direct object is a specific person, or sometimes a personified being:

• Veo a María.
• Conocemos al abogado.

But here the direct object is an abstract legal concept:

• acredita el interés legítimo

So no a is used.