Hague Apostille and Document Legalisation in Baix Llobregat

September 15, 2026

In an increasingly interconnected world, the need for our documents to be valid beyond our borders is now commonplace. Whether for employment, academic, family or investment purposes, you may at some point need a birth certificate, university degree or notarial power of attorney issued in Spain to be officially recognised in another country. This is where two key concepts come into play: the Hague Apostille and document legalisation.

These procedures are essential for legalising foreign documents and ensuring that their validity is recognised by the authorities in the destination country. Without the correct apostille or legalisation, a Spanish public document may have no legal effect abroad, disrupting your plans or projects. At Notaría Susana Martínez, with more than 25 years of experience in Castelldefels and Baix Llobregat, we understand the importance of these formalities and provide the advice and assistance you need to navigate this complex process with complete confidence. From Castelldefels, we help ensure that your documents valid outside Spain meet all applicable requirements, giving you peace of mind and an efficient service.

In this article, we will explore in detail what the Hague Apostille and legalisation are, when you need each one, how the process works and which documents commonly require them. Our aim is to help you fully understand these essential procedures for the international use of your documents and explain how Notaría Susana Martínez can assist you at every stage.

What Are the Hague Apostille and Document Legalisation?

Although both procedures seek to give a public document international validity, the Hague Apostille and legalisation are different processes applied in different circumstances, depending on the document’s destination country. Understanding this distinction is crucial to ensuring that your document is accepted without difficulty.

The Hague Apostille: Simplifying International Validity

The Hague Apostille is a certificate that authenticates the signature and seal on a public document. It is issued by the authorities of a country that is party to the 1961 Hague Apostille Convention. Its main purpose is to simplify the legalisation process between signatory countries. Instead of undergoing a lengthy and costly diplomatic or consular legalisation process, a document bearing an Apostille is directly recognised in any other country that is a signatory to the Convention. It is, in essence, a form of “super-legalisation” that streamlines the procedure.

This certificate is affixed directly to the original document or to an attached sheet and contains standardised information, making international verification easier. Notaría Susana Martínez can prepare your documents so that they meet the preliminary requirements for an apostille, ensuring that their content and format are correct.

Diplomatic or Consular Legalisation: A More Complex Process

When the destination country of your document is not party to the Hague Convention, diplomatic or consular legalisation is required. This is a longer process involving several stages:

Initial legalisation: The document must be legalised by the relevant national authorities in the country of origin (for example, the Ministry of Justice or the Ministry of Foreign Affairs in Spain).
Consular/diplomatic legalisation: The document must then be legalised by the diplomatic or consular representation of the destination country in the country of origin.

This multi-stage method ensures that the document has undergone several authenticity checks. Given its complexity, obtaining expert advice from a notary’s office such as ours in Baix Llobregat is essential to avoid errors and delays. We can help you prepare all the documentation required before visiting the notary for these procedures, thereby optimising the process from the outset.

Countries Party to the Hague Convention: Do You Need an Apostille or Legalisation?

Determining whether you need a Hague Apostille or legalisation is the first and perhaps most important step. This depends exclusively on whether the country where the document is to take effect is a signatory to the 1961 Hague Convention.

How to Identify the Correct Procedure for Your Destination Country

To find out whether a country is party to the Hague Convention, you can consult the updated list of signatory countries on the official website of the Hague Conference on Private International Law or on the website of the Spanish Ministry of Justice.

If the destination country is a signatory: You will need the Hague Apostille. This is the simplest scenario because, once apostilled, the document will be valid in all other countries that are party to the Convention.
If the destination country is NOT a signatory: You will require diplomatic or consular legalisation. In this case, the process will be more involved, and the document must be validated by several authorities, including the destination country’s embassy or consulate in Spain.

It is essential to verify this information accurately, as an error in the type of certification could invalidate the entire process and cause significant setbacks. At Notaría Susana Martínez, we advise you on the correct route to ensure that your international notarial procedures are successful. Our professionals have the experience required to verify this information and ensure that your documents meet international requirements, making us a trusted point of reference as Notaría Susana Martínez: More Than 25 Years of Experience in Castelldefels and Baix Llobregat.

Implications for Countries Not Party to the Convention

For countries that have not acceded to the Hague Convention, the legalisation process may vary significantly. Some countries may have bilateral agreements with Spain that simplify the process, while others require a complete chain of legalisations that may include:

Recognition of the signature by the authority that issued the document.
Legalisation by the Ministry of Justice.
Legalisation by the Ministry of Foreign Affairs, European Union and Cooperation.
Final legalisation by the Consulate or Embassy of the destination country in Spain.

This process can be lengthy and costly. Careful planning and specialist advice are therefore vital. Bear in mind that certain documents, such as those relating to Wills for Foreign Residents and International Inheritances in Castelldefels, often require these complex procedures to be valid internationally.

Process and Requirements for Apostilling or Legalising Documents

Regardless of whether you need an Apostille or consular legalisation, the first step in preparing your documents will usually involve a notary. Notaries play a key role in the initial stage of these procedures.

The Notary’s Essential Role in Preparing Documents

Before a document can be apostilled or legalised, it must meet certain requirements. In many cases, you will need a certified copy of the original or the formalisation of a private document as a public instrument (elevación a público). This is where the notary’s work is indispensable:

Authentication of signatures: The notary can certify the authenticity of a signature on a private document, converting it into a notarial public document (for example, a private contract or commercial document).
Certified copies: If you need to apostille or legalise a copy of an original document, the notary can issue a certified copy, guaranteeing that it is a true and exact reproduction of the original.
Legally certain dates: The notary gives documents a legally certain date (fecha cierta), which is essential to their legal validity.
Notarial acts: In the case of notarial acts or documents authorised by the notary, such as Notarial Powers of Attorney and Notarial Acts: Your Legal Solution in Baix Llobregat, these already have public-document status and may be directly suitable for the subsequent apostille or legalisation stages.

Notarial involvement ensures that the document has the appropriate form and substance to be accepted in the international certification process. At Notaría Susana Martínez, we ensure that every document is prepared impeccably.

Key Steps for Obtaining Your Apostille or Legalisation

Once the document has been prepared, the general process involves the following steps:

Verification of the document: Make sure that the document is an original or a certified copy and that its content is correct.
Identification of the issuing authority: Determine which government body is responsible for the Apostille or initial legalisation (the Ministry of Justice for judicial or notarial documents; the Ministry of Foreign Affairs for administrative documents, among others).
Application for Apostille/Legalisation: Submit the document to the competent authority. In Spain, the Apostille is mainly requested from the Ministry of Justice (for judicial and notarial documents) or the High Courts of Justice of the Autonomous Communities, and from the Ministry of Foreign Affairs for administrative documents.
Consular Legalisation (if applicable): If you need consular legalisation, once the document has been legalised by the Spanish Ministry of Foreign Affairs, you must submit it to the Consulate or Embassy of the destination country in Spain for final legalisation.

It is important to note that, in some cases, documents may require a sworn translation into the official language of the destination country. This translation may also need to be apostilled or legalised. At Notaría Susana Martínez, we can advise you on all these details and specific requirements.

Common Documents Requiring International Certification

Almost any public document intended to take effect abroad may need to be apostilled or legalised. However, some types of documents are more commonly involved in these procedures than others.

Personal and Family Documents

These are some of the documents most frequently submitted for apostille or legalisation:

Birth, marriage or death certificates: Essential for nationality procedures, inheritances, family reunification or marriages abroad.
Criminal record certificates: Required for immigration procedures and work or residence visas.
Civil status documents: Documents relating to divorce by mutual consent, matrimonial property agreements (capitulaciones matrimoniales) or the establishment of registered partnerships.
Notarial powers of attorney: Authorisations allowing one person to act on behalf of another abroad, whether for banking transactions, the purchase and sale of property or legal representation.

Academic and Professional Documents

For those seeking opportunities outside Spain, certification of their credentials is vital:

University degrees, diplomas and academic certificates: Required for the recognition of studies, admission to master’s or postgraduate programmes, or practising a profession in another country.
Transcripts and academic records: These accompany qualifications to certify a person’s academic history.
Employment experience or social security contribution records: These may be requested for work visas or the recognition of professional qualifications.

Corporate Documents and Contracts

The business sector also generates significant demand for international certification:

Company incorporation deeds: Required to establish subsidiaries or open businesses abroad.
Corporate powers of attorney and commercial authorisations: These allow legal representatives to act on behalf of the company in other countries.
Commercial contracts: Business agreements that must be legally recognised outside Spain.
Commercial registry certificates: Used to certify a company’s existence and legal status.

If you have questions about which documents valid outside Spain you need to apostille or legalise, please do not hesitate to contact us. At Notaría Susana Martínez in Castelldefels, we provide clear and transparent advice.

Frequently Asked Questions About Apostilles and Legalisation

Below, we answer some of our clients’ most common questions:

How Long Does the Apostille or Legalisation Process Take?

The time required varies considerably. An Apostille is usually quicker and may be processed within a few days or weeks, depending on the workload of the issuing authority. Diplomatic or consular legalisation is a longer process that may take several weeks or even months due to the multiple stages involved and the bureaucracy of embassies/consulates. We recommend starting the procedure well in advance.

How Much Does an Apostille or Legalisation Cost?

The associated costs include the fees charged by the Apostille-issuing authority or by the Ministries of Justice/Foreign Affairs for legalisation, as well as consular fees if diplomatic legalisation is necessary. Notarial fees for preparing and authenticating the documents must also be added. You can consult a general estimate in our article on Notarial Fees in Castelldefels and Prices in Baix Llobregat: Transparency and Efficiency.

Can I Apostille or Legalise a Simple Copy of a Document?

No, generally you cannot. Both the Apostille and legalisation require the original document or a certified copy issued by a notary or competent public official. A simple copy does not have the validity and authenticity required for these procedures.

Which Documents Cannot Be Apostilled or Legalised?

Generally, private documents without public-document status—unless formalised as a public instrument by a notary—customs or commercial documents, although related certificates may be eligible, and documents issued by diplomatic or consular agents do not require and cannot be apostilled or legalised, as they already have international recognition by their very nature.

Trust Notaría Susana Martínez with Your International Procedures

The Hague Apostille and document legalisation are essential procedures for ensuring the validity and effectiveness of your public documents abroad. Understanding their differences and requirements is fundamental to avoiding setbacks in your personal, academic or professional projects.

At Notaría Susana Martínez, located in Castelldefels and serving the entire Baix Llobregat area, we have more than 25 years of experience and a highly qualified team to advise you and efficiently manage all your international notarial procedures. We take pride in our personalised attention, transparency regarding our fees and efficient processing. Furthermore, our ability to assist international clients in several languages ensures that you receive clear explanations and a service without language barriers.

Do not leave the validity of your most important documents to chance. Trust the experience and commitment of Notaría Susana Martínez to ensure that your documents are correctly prepared and certified for international use. Contact us today to request an appointment and let our experts guide you step by step through this crucial process.