The expat document problem: keeping two countries' paperwork in order

A British couple retire to Andalucía. They spend several years building a life there: a property purchased through a Spanish notary, a residencia granted by the local foreigners' office, NIE numbers for both spouses, a Spanish bank account, and a modest investment portfolio held in Madrid. Back in England, the family home is let to tenants. Their wills were drafted in London before the move and have never been updated.

Then one spouse dies. The surviving partner, grieving and disoriented, must now satisfy two probate jurisdictions, two tax authorities, and a Spanish notary who requires the original deed for the Andalucían property before he will release anything. The deed is somewhere in a removal box in the spare bedroom. The NIE certificate for the deceased cannot be found at all. The process that might have taken three months takes closer to two years.

This is not an unusual story. It is, in fact, a representative one.

What the paperwork actually consists of

Expat life generates documents that ordinary UK estate administration does not encounter, and each one carries consequences if it goes missing or is out of date.

• Passports. Both British and host-country identity documents must remain valid and consistent. Surnames that differ across documents because of a remarriage or a clerical error can block everything from bank account access to property registration.
• NIE number certificates. Spain's Número de Identificación de Extranjero is required for virtually every financial transaction in the country, including buying or selling property, opening accounts, and filing tax returns. The number itself does not expire, but the physical certificate issued at the time of registration is often the only proof accepted by notaries. Losing it means a trip to a foreigners' office and, frequently, a queue.
• Residencia documentation. Post-Brexit, British nationals living in Spain who registered under the Withdrawal Agreement hold a green certificate or a biometric TIE card. Both matter. The TIE is now the preferred form, and some administrative offices will not accept the older green certificate for new applications. Knowing which document you hold, and whether it reflects your current address and civil status, is not a trivial question.
• Foreign property deeds. Spanish escrituras are original notarial documents. Copies are obtainable from the Land Registry (Registro de la Propiedad), but obtaining them from abroad, in a foreign language, under time pressure during probate, adds weeks and cost. The same applies to French actes de vente, Portuguese escrituras, and equivalent documents elsewhere.
• Dual tax filings. A UK resident who owns Spanish property must file a non-resident income tax return in Spain each year, even if the property is not let. A Spanish resident with UK income must report it to HMRC under self-assessment and also declare worldwide assets to the Agencia Tributaria. Records of past filings, tax residency certificates, and correspondence with both authorities are evidence that matters enormously if either authority opens an enquiry, or if executors need to demonstrate a clean tax position before distributing an estate.
• Powers of attorney. Cross-border families often grant a Spanish poder notarial to a local lawyer or trusted family member, allowing them to act on property and banking matters without the principal being present. If this document cannot be located, or if it has expired, transactions stall entirely.

Each of these documents exists in isolation: filed with a solicitor, stored in a drawer in the Spanish house, emailed to a family member and then lost in an inbox. The problem is not that expat families are careless. It is that the system creates no natural place for all of it to live together.

What happens when a document disappears

The cost is rarely financial in the first instance. It is temporal and emotional. Probate in Spain can already take a year under favourable conditions. Add a missing deed and the process extends. Add a disputed tax residency question, because the deceased held no records of their annual non-resident filings, and it extends further. Spanish inheritance tax, which varies sharply by autonomous community and by the relationship between deceased and beneficiary, cannot be settled until the estate is valued and documented. Interest accrues on unpaid tax during the delay.

Meanwhile, the surviving spouse may be locked out of a joint account, unable to access funds in the Spanish property, and simultaneously managing HMRC's requirements for the UK estate. The emotional burden of doing this without a complete, organised record of the family's cross-border paperwork is considerable. Families who have done the work in advance, who know exactly where every document is and have stored copies securely, move through this process in a fraction of the time.

The practical discipline is not complicated. Every significant document, in both countries, should be listed, dated, and stored somewhere that survives the death or incapacity of the person who originally filed it. That means somewhere other than a personal email account, a physical filing cabinet accessible only to one person, or the memory of a lawyer who may have retired.

Glenvault is designed precisely for this: a private family vault where cross-border documents, account records, and succession instructions are held together and can be accessed by the right people at the right moment. If your paperwork spans more than one country, start organising it at glenvault.com/signup.