There is a comforting sentence families use after a foreign resident dies in Spain: the inheritance is handled here. Often that is true. The deceased lived in Spain, the last will is identified through the Spanish certificate of last wills, the heirs sign the deed of acceptance and adjudication before a notary, Spanish inheritance tax is filed, and the Spanish bank or land registry has a local document it understands.
Then somebody remembers the condominium in Florida, the shares still sitting with an American transfer agent, the taxable brokerage account that never had a transfer-on-death designation, or the bank account that froze because the named executor is not recognised by the US institution. The Spanish file is complete. The American asset has not moved.
This page is about that second file. Not the broad comparison between US estate tax and Spanish inheritance tax, and not the beneficiary-form problem covered in our note on TOD and POD accounts in Spain. This is narrower and more practical: which US assets require someone in America to be satisfied before they can be transferred?
On this page
The two-file problem What ancillary probate means Why Brussels IV does not unlock America US-situs is an inventory question The Form 706-NA and transfer-certificate layer Which assets usually create the US file Planning before the death Frequently asked questions
"A Spanish inheritance deed answers the Spanish question. For US assets, the first practical question is different: who in America has to be persuaded to press transfer?"
— Lola Jurado · Immigration lawyer, Ilustre Colegio de Abogados de Málaga (nº 10907)
The two-file problem
Cross-border inheritance fails when the family confuses entitlement with release. Entitlement is the question of who should receive the asset. Release is the question of what the person currently controlling the asset needs before they will move it.
Spain may answer the first question. If the deceased was habitually resident in Spain, Regulation (EU) No 650/2012 usually points the succession machinery to the courts or authorities of that habitual residence, subject to the choice-of-law rules and the particular facts. Spanish practice then centres on documents the notary can receive: death certificate, last-wills certificate, will or declaration of heirs, inventory, valuations, tax filings and the deed of acceptance and adjudication.
But a US asset is often controlled by a US gatekeeper. A county recorder controls the title register for a house. A cooperative board may control transfer of a New York co-op interest. A broker controls the account. A transfer agent controls directly registered shares. A bank controls a deposit. Those institutions are not deciding Spanish succession law as a theory question. They are deciding whether the person asking them to transfer property has authority under the rules they apply.
What ancillary probate means
Ancillary probate is not a moral failure of the estate plan. It is a local release mechanism. The main succession is somewhere else; the asset is in a jurisdiction that wants a local personal representative, court order or equivalent authority before the asset moves.
For a US retiree who dies while resident in Spain, the main family work may be here: Spanish certificates, Spanish tax, Spanish notary, Spanish property. But if the deceased still owned real estate in the United States, many states require a local probate or ancillary administration to transfer title. If the deceased held US securities directly with a transfer agent and no beneficiary designation is accepted, the transfer agent may ask for court papers. If an account lacks a valid TOD/POD designation, the custodian may not treat the Spanish heirs as people with signing authority merely because the Spanish deed says they inherit.
The word "probate" also hides state-by-state variation. A small estate affidavit, a domiciliary foreign personal representative procedure, a full ancillary administration and a transfer by affidavit are not the same thing. The useful early question is not "will there be probate?" It is "which document will this exact US holder require to release this exact asset?"
Why Brussels IV does not unlock America
Article 22 of the EU Succession Regulation can be crucial for Americans living in Spain because it lets a person choose the law of their nationality to govern the succession. For a US citizen, that choice can be the difference between a Spanish forced-heirship fight and a cleaner private-client plan. Article 21, by contrast, generally looks to habitual residence at death. Article 23 says the law determined under those rules governs the succession as a whole.
That is powerful inside the Regulation's world. It does not turn a Spanish notarial deed into a US court appointment. The Regulation does not bind a Florida recorder, a Delaware transfer agent or a New York Surrogate's Court as if they were Spanish authorities. It decides, on the European side, which succession law governs and which authority has jurisdiction. It does not make a US institution accept foreign paperwork when its own state-law or federal-tax process says otherwise.
This distinction matters because families sometimes think the will has solved the US problem. The will may solve the law problem. It may name the beneficiaries. It may choose US law where that is available. It may avoid Spanish forced-heirship consequences. But the US gatekeeper may still ask: where is the personal representative with authority over this asset?
US-situs is an inventory question
The second trap is using "my US account" as if it were a legal category. A brokerage account is a container. The tax and release analysis may depend on what is inside it, how it is titled, where the issuer is, whether a beneficiary designation exists, whether the decedent was a US citizen, and whether the decedent was domiciled in the United States for estate-tax purposes.
For nonresident noncitizens, the US estate tax does not start from worldwide wealth in the same way it does for US citizens. The US regime looks to US-situated property. Section 2104 treats shares of stock issued by a domestic US corporation as property within the United States when owned by a nonresident not a US citizen. US real estate and tangible personal property located in the United States are the obvious examples. Section 2105 then removes some categories, including certain bank deposits and portfolio-debt-type property. The point is not to memorise the list. The point is to stop treating a statement balance as the answer.
A Spanish heir looking at an account with Apple stock, US Treasury obligations, a money-market fund, a municipal bond and cash is not looking at one legal object. They are looking at a list of positions that may not have the same situs analysis. That inventory has to be prepared before anyone can answer the 706-NA, transfer certificate or release question cleanly.
The Form 706-NA and transfer-certificate layer
The IRS describes US estate tax for estates of nonresidents not citizens as a tax on the transfer of US-situated property. Its current guidance says Form 706-NA is required where the fair market value at death of the decedent's US-situated assets exceeds 60,000 dollars, with the relevant adjusted taxable gifts and historic gift tax specific exemption taken into account. That 60,000-dollar figure is small enough to surprise families who own even a modest US brokerage position or a partial interest in US real estate.
The transfer-certificate layer is the operational part. Certain US custodians and transfer agents may refuse to transfer property from a nonresident noncitizen estate until the IRS transfer-certificate question is cleared. The family experiences this not as tax theory but as a frozen asset: the institution is not saying the Spanish heir is wrong, only that it will not release the asset until its own checklist is satisfied.
That is why "there will be no US estate tax" is not the same as "there is no US file." Deductions, treaty analysis, debts, situs exclusions and valuations may reduce or eliminate tax. They do not automatically remove the need to show the US holder why the asset can be released.
Which assets usually create the US file
| Asset | Why it can block | First document question |
|---|---|---|
| US real estate | Title is controlled by a local recorder and state real-property rules | Does the state require ancillary administration or a local transfer procedure? |
| US corporate stock | Section 2104 can treat domestic-company stock as US-situs for a nonresident noncitizen | Will the broker or transfer agent require probate papers, Form 706-NA analysis or a transfer certificate? |
| Brokerage account without TOD | The custodian needs authority to retitle or distribute the account | Who can sign for the estate under the custodian's rules? |
| Direct registration / transfer-agent shares | The asset sits outside the ordinary brokerage relationship | Does the transfer agent accept foreign succession documents? |
| US bank deposit | May be operationally frozen even where the situs tax answer is softer | Is there a POD beneficiary, joint owner or small-estate route? |
| IRA / 401(k) | Usually driven by beneficiary designation and income-tax rules, not probate first | Who is the named beneficiary and what distribution regime applies? |
Planning before the death
The fix is not to assume every US asset needs ancillary probate. That would be as crude as assuming none of them does. The fix is an asset-by-asset release map.
- List every US asset. Real estate, co-op interests, LLC interests, brokerage accounts, directly registered shares, bank deposits, Treasury accounts, retirement plans, life insurance and any account with a beneficiary form.
- Identify the gatekeeper. Recorder, broker, transfer agent, bank, plan administrator or insurer. The person controlling release tells you what file exists.
- Separate tax situs from operational release. A deposit might not be the hardest estate-tax asset and still be hard to unlock. Stock might be easy operationally but important for Form 706-NA.
- Check beneficiary forms without romanticising them. A valid TOD or POD can avoid a US probate step, but it may create the Spanish beneficiary-tax problem explained in our TOD/POD note.
- Ask the US adviser state-by-state questions. "What would this Florida recorder require?" is better than "Do we need US probate?"
- Keep the Spanish notary in the loop. The US file should not contradict the Spanish deed, the tax filings or the choice-of-law plan.
The family that wins is not the family with the longest will. It is the family that knows, before death, which institutions will be holding the keys after death. In a Spain-US inheritance, the most expensive document is often not the missing will. It is the account statement nobody translated into a release checklist.
Frequently asked questions
Does a Spanish inheritance deed release US assets automatically?
No. A Spanish deed of acceptance and adjudication is the core Spanish succession document, but it does not force a US county recorder, broker, transfer agent or bank to transfer an asset. The US institution may need its own authority under the law of the state where the asset or account is administered, especially for real estate, certificated shares, transfer-agent positions or accounts without a functioning beneficiary designation.
What is ancillary probate?
Ancillary probate is a secondary local probate or estate administration in a jurisdiction where the deceased owned property, while the main succession is handled somewhere else. In this context, Spain may be the main succession file because the deceased lived in Spain, but a US state may still require a local process to transfer a Florida condominium, a New York cooperative interest or a US account that will not move on foreign documents alone.
When does Form 706-NA matter for Spanish heirs?
Form 706-NA matters when the deceased was neither domiciled in nor a citizen of the United States and owned US-situated assets at death above the filing threshold once adjusted taxable gifts and the old gift tax specific exemption are considered. IRS guidance states the practical threshold as 60,000 dollars of US-situated assets for nonresident noncitizen estates. Even where no tax is ultimately due, the filing or transfer-certificate question can block release of US property.
Are US brokerage accounts always US-situs assets?
No. The answer depends on what is actually owned and who the decedent was. US corporate stock held by a nonresident noncitizen is treated as US-situs property under section 2104. Some bank deposits and portfolio debt may be excluded under section 2105, while US real estate and tangible property located in the United States are the obvious US-situs assets. A brokerage statement is not the legal answer; the inventory has to be broken down security by security.
Can a Brussels IV choice of law avoid a US probate file?
Usually not by itself. Article 22 of Regulation (EU) No 650/2012 can let a person choose the law of their nationality to govern the succession on the European side, and that may be critical for Spanish forced-heirship planning. But it does not bind a US recorder, court or transfer agent that is being asked to move US property. Choice of law decides who should receive. The local release file decides who has authority to sign in America.
What should US retirees in Spain do before death?
Make a US-asset inventory before anyone needs it: real estate, US company shares, brokerage holdings, transfer-agent shares, bank deposits, retirement accounts, insurance, beneficiary forms and account custodian details. Then ask two separate questions in writing: who inherits under the Spanish and EU succession analysis, and what document will the US holder require before it transfers each asset. The second question is the one families discover too late.
Sources reviewed July 2026: IRS, estate tax for nonresidents not citizens of the United States and transfer certificate filing requirements for estates of nonresidents not citizens; IRS, About Form 706-NA; 26 U.S.C. §§2104, 2105 and 2106; Regulation (EU) No 650/2012, especially articles 21, 22 and 23. State probate requirements vary by US state and are not covered here. General information only, not legal, tax, immigration or US probate advice. We are not US tax advisers and do not give US federal tax opinions. Confirm the situs, probate, transfer-certificate and Spanish succession consequences for your own facts with Spanish and US advisers before relying on any structure or filing position.