Affidavit of Spanish Succession Law for UK Probate

Complete Legal Guide (2026) — Spain · England & Wales

When the UK Probate Registry (HMCTS) asks for a “Spanish law affidavit”, it is requesting a clear, authoritative explanation of Spanish succession law as it applies to the deceased’s estate — specifically:

• how Regulation (EU) No 650/2012 determines the applicable law,
• how heirs are identified under Spanish law (including legítimas / forced heirship), and
• what executors are legally empowered to do with Spanish assets.

This guide explains when and why the affidavit is required, how it is prepared, what it must contain, and how to avoid delays or rejections in UK probate applications involving Spain.

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What is a Spanish Law Affidavit for UK Probate?

A Spanish law affidavit is an expert legal statement explaining how Spanish succession law applies to a particular estate with a UK probate process.

It is typically required where:

• the deceased owned assets in Spain, and/or
• Spanish law may apply under EU Succession Regulation 650/2012, and/or
• the UK Probate Registry needs confirmation of heirship and executor authority under Spanish law.

The affidavit is drafted in English, cites Spanish law where relevant, and is designed to be understood and relied upon by the UK Probate Registry.

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Who asks for a Spanish law affidavit?

• England & Wales: HMCTS Probate (Probate Registry) in non-contentious applications
• Scotland: Sheriff Court (Commissary)
• Northern Ireland: Probate Office of the High Court

A court only becomes involved if the matter turns contentious. In the vast majority of cases, the request comes directly from the Probate Registry during routine examination of the application.

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Why UK Probate Registries request it

Cross-border estates frequently stall because of:

• conflicts of law (UK vs Spanish rules),
• uncertainty over forced heirship,
• lack of clarity about executor powers over foreign assets.

The affidavit resolves this by giving the Registry a clear legal bridge between the UK probate system and Spanish succession law, allowing the Grant to issue once the Registry is satisfied.

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The legal framework explained (2026)

Regulation (EU) No 650/2012 (EU Succession Regulation)

The Regulation sets uniform conflict-of-law rules for international successions.

• The default rule: the law of the deceased’s habitual residence applies.
• Exception: a valid professio iuris (choice of law) may allow the law of nationality to apply instead.

The affidavit explains which law applies in the specific case, and why.

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Legítimas (forced heirship under Spanish law)

Spanish succession law includes mandatory reserved shares for certain heirs (typically children).

The affidavit explains:

• whether legítimas apply in the case,
• whether a choice of law displaces them,
• how they affect distributions and executor powers.

Clear analysis here is essential to avoid Registry queries and later disputes between beneficiaries.

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Executor powers over Spanish assets

UK executors often assume their powers automatically extend to Spain. They do not.

The affidavit clarifies:

• whether executors can sell, manage, or transfer Spanish assets,
• whether heirs acquire rights directly,
• and how Spanish notaries and registries will treat the estate.

This is a key point the UK Probate Registry expects to see addressed.

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How the process works

1. Clarify the facts

We review:

• domicile and habitual residence,
• UK and/or Spanish wills,
• marital property regime,
• location and nature of Spanish assets.

2. Draft the expert affidavit (in English)

We explain:

• applicable law under Reg. 650/2012,
• heirship (including legítimas),
• executor authority over Spanish assets.

3. Notarisation and apostille

We arrange notarisation and, where required, the Hague Apostille.

4. Filing and follow-up

The affidavit is filed with the probate application. We remain available to respond to Registry queries until the Grant issues.

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Typical timeframe

Most affidavits are completed within 5–14 days once all documents are provided.

Timing depends on:

• complexity (multiple wills, multiple jurisdictions),
• notary availability,
• apostille turnaround.

If the Registry has imposed a deadline, we can prioritise drafting first so the application continues moving while formalities are completed.

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Documents checklist

• UK and/or Spanish wills (and codicils)
• Proof of domicile / habitual residence
• Family details and marital property regime
• Inventory of Spanish assets (if any)
• Exact wording of the Probate Registry request

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Common scenarios

Scenario	Applicable law (Reg. 650/2012)	Practical impact
Deceased habitually resident in Spain	Spanish law applies unless valid choice of law	Possible legítimas; executor powers must be clarified
UK will + Spanish will	Conflict analysis required	Harmonisation avoids distribution clashes
Spanish assets only	Spanish law on assets; UK procedural law	Affidavit confirms heirship + executor authority

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Why this matters

Without a properly drafted affidavit:

• probate applications are delayed,
• Registries raise repeated requisitions,
• executors are left uncertain,
• families face unnecessary stress and cost.

A precise affidavit resolves the legal uncertainty at the outset, allowing probate to proceed smoothly and with confidence.

FAQ — “Spanish law affidavit” for UK Probate (2026)

What is this affidavit, in simple terms?

It’s a short expert document that explains how Spanish inheritance law applies to your situation, so the UK Probate Registry can move your application forward when Spain is involved (for example, a property in Spain or a Spanish will).

Why is HMCTS asking for it?

Because UK probate is a UK procedure, but Spanish law can affect who inherits and what an executor can do with Spanish assets. The Registry needs a clear explanation so they can issue the Grant without uncertainty.

Does this mean there’s a dispute or court case?

Usually, no. Most requests come up in straightforward, non-contentious probate applications. A court is only involved if the matter becomes contentious.

Will HMCTS actually accept it?

Yes, provided it is clear and properly formalised. The key is that it’s written in English, prepared by a Spanish-law expert, and notarised (and usually apostilled if signed outside the UK).

How long will it take?

In most cases, 5–14 days once we have the full set of documents. If HMCTS has given you a deadline, we can usually prioritise drafting first and then organise notarisation/apostille immediately after.

What information do you need from me?

Typically:

• the HMCTS request/requisition (a screenshot or PDF is fine),
• the will(s) and any codicils (UK and/or Spanish),
• basic family details (spouse/children),
• where the person lived (habitual residence / domicile info),
• and details of any Spanish assets (property, bank accounts, etc.).

I’ve heard Spanish law has “forced heirship”. Should I worry?

Not necessarily. Spain has legítimas (reserved shares for certain heirs), but whether they apply to you depends on the facts and on the international rules. The affidavit explains clearly whether legítimas apply in your case and what that means.

If there’s a UK will and a Spanish will, is that a problem?

It can be fine — but it needs to be explained properly. We check whether the wills are meant to cover different assets, whether anything conflicts, and whether there’s a valid choice of law. Then we explain the outcome so HMCTS isn’t left guessing.

Do I need a Spanish translation?

Usually, no. The affidavit is drafted in English for HMCTS. We reference Spanish law where needed, but we explain it in a way the Registry can follow.

Will this help the probate application move forward?

That’s the purpose. HMCTS usually asks for this when they need clarity. A well-prepared affidavit typically reduces follow-up questions and helps the Grant issue once the Registry is satisfied.

How much does it cost?

It depends on complexity (for example, multiple wills, multiple countries, complex family circumstances, or several Spanish assets). Once we’ve seen the HMCTS request and your documents, we confirm a clear quote before drafting.

What’s the quickest way to start?

Send us:

1. HMCTS request wording
2. Will(s)
3. Basic family details
4. Spanish asset details
   We’ll confirm what’s missing and give you a realistic timeline.

What happens after the Grant is issued?

If there are Spanish assets (like a property), there are usually Spanish steps afterwards (notary documentation, registry matters, sometimes tax filings). We can advise on the next steps once we know what assets are involved.

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Quick reassurance:
If HMCTS is asking for this, you are not alone — it’s a common issue in UK–Spain estates. The goal is simply to give the Registry a clear legal explanation so the process can move forward.

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See also

• Spanish wills for residents in Spain → /spanish-wills
• Inheritance law in Spain for foreigners
• EU Succession Regulation 650/2012 explained

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Contact

We prepare expert affidavits of Spanish succession law for UK probate across England & Wales and Spain — clear, compliant, and court-accepted.

About CostaLuz Lawyers and María de Castro

You can read testimonials from hundreds of satisfied clients, going back to 2006, on our website, on Google Reviews and on EyeonSpain.

Reviewed by María de Castro, Abogado no. 2745, Ilustre Colegio de Abogados de Cádiz. CostaLuz Lawyers has supported international buyers since 2006 on EyeonSpain  with guidance and advice on the legal aspects of life in Spain. Included in the lawyers lists of the UK and Ireland embassies. Updated 22 Nov 2025.

María Luisa de Castro’s work, founder of CostaLuz Lawyers, is backed by a strong presence in specialist media and professional directories. Her track record as a Property Law and Consumer Real Estate Law (Derecho de Consumo Inmobiliario) specialist can be seen in her guides for international audiences on Expatra, in her long-running blogs on Spanish off-plan protection and Ley 57/1968 on EyeOnSpain , in her legal analysis for Confilegal and Legal Today, and in her contributions for the Spanish Bar Council (Consejo General de la Abogacía Española) and the Centre for Consumer Studies at the University of Castilla-La Mancha.

Her work is also profiled on international retirement and expat platforms such as Retirement Abroad, and has been highlighted by expat media including The Olive Press News Spain and The Local Spain among other specialist expat and legal forums.

Her legal work has also been featured or referenced in respected international and Spanish media, including The Telegraph, The Times, the BBC, El País and El País English, The Local Spain, The Olive Press and other reputable outlets, particularly in connection with landmark court rulings on Ley 57/1968 and Spanish consumer protection.

CostaLuz Lawyers is also included in the official lists of English-speaking legal professionals for British and Irish nationals in Spain, as compiled by the UK government’s “Spain: list of lawyers” and by the Embassy of Ireland in Spain and its honorary consular network.

For a complete overview of wills and inheritance in Spain, see our Spanish Wills & Testament Guide 2026.

Reviewed by María Luisa de Castro, CEO at CostaLuz Lawyers — Updated 2026

This is general information, not definitive legal advice — every case requires individual analysis.