What Is “Double Legalisation” and When Is It Applied?

What is “double legalisation” and when is it required?

In international practice, Bulgarian documents often need to be used outside the European Union and beyond the scope of the Hague Apostille Convention. In such cases, the so-called “double legalisation” applies – a procedure that ensures the full recognition of the document abroad. The term itself is used informally in practice and usually refers to the process of legalising a foreign document so that it can be relied upon in Bulgaria.

What does “double legalisation” mean?

Double legalisation is an extended procedure for authenticating documents, ensuring their international recognition. Unlike the apostille, where certification is carried out by a single authority, double legalisation involves two consecutive steps performed by different institutions. First, the document is legalised in the country where it was issued. This means that a competent authority – such as the Ministry of Education, a court, a notary or the commercial register – confirms that the document is genuine, issued by a duly authorised body and compliant with all national requirements. In Bulgaria, this initial legalisation is usually carried out by the Ministry of Foreign Affairs, which certifies the authenticity of the signature and seal on the document.

Once the first step has been completed, the second follows – the document must be submitted to the consular or diplomatic mission of the country where it will be used. The consulate of the receiving state carries out its own verification to ensure that the initial legalisation is valid and that the document complies with the local legal standards. Only after this additional certification is the document regarded as fully legalised and fit for use abroad without restriction.

In this way, a form of “double guarantee” of authenticity is provided – the document is recognised both by the country in which it was issued and by the country where it will be used. This is particularly important when presenting documents before courts, universities, public authorities or employers. For instance, if a Bulgarian citizen intends to marry in the United Arab Emirates, their certificate of marital status will not be accepted with certification from the Bulgarian authorities alone. It must also be legalised at the UAE Embassy to ensure that the local institutions will recognise it as valid.

Double legalisation is mainly applied in countries that are not party to the 1961 Hague Convention – the international treaty that introduced the simplified system of certification through an apostille. In such cases, documents cannot be recognised with a single certification and must instead go through the more complex two-stage procedure. In addition, even some states that are signatories to the Convention occasionally impose stricter national requirements for certain categories of documents, particularly in sensitive areas such as education, commerce or judicial matters.

In practice, this means that every situation must be assessed individually. For example, if a Bulgarian company decides to open a branch in the United Arab Emirates, its registration documents – such as extracts from the Commercial Register or court certificates – must first be legalised in Bulgaria and then receive an additional certification at the UAE consular office. A similar procedure applies to a student applying to a university in Canada, where diplomas and academic references must undergo double legalisation in order to be recognised by the local educational institutions.

Similar requirements are imposed in Qatar, where employers often insist not only on the legalisation of diplomas and professional qualifications but also on a separate certification of their translation. In Saudi Arabia, the procedure is equally strict – commercial documents, contracts and powers of attorney frequently need to be legalised, with the entire process involving several different authorities. Another example is Vietnam, where documents intended for employment or marriage also require double legalisation, even if the document has already been issued with an apostille.

Difference between “double legalisation” and “chain legalisation”

“Double legalisation” describes the principle: the document is certified both in the country of origin and in the country of destination – in other words, there are two final certifications in two different jurisdictions (for example, the Ministry of Foreign Affairs in Bulgaria and the consulate of the receiving state). “Chain legalisation”, on the other hand, describes the method or path by which these final certifications are reached: the document often passes through a sequence (“chain”) of intermediate authorities – a local authority, a sectoral ministry (such as education, health or justice), then the Ministry of Foreign Affairs, and only afterwards the consulate. Put simply, double legalisation is about “where” (two countries), while chain legalisation is about “how” (the number of steps within the system). In practice, almost every double legalisation is achieved through a chain of certifications that links the signature of the issuing authority to the state seal and, ultimately, to the receiving country. The more “private” the document is (for example, a power of attorney, contract or declaration), the longer the chain of internal verifications before it reaches the Ministry of Foreign Affairs and the consulate. For “public” documents (such as civil status certificates, court attestations or diplomas), the chain often includes a sectoral ministry which confirms the signatures of the issuing authority. In non-apostille countries this is the standard approach; in apostille countries the chain is usually replaced by a single apostille (without consular certification), although even apostille states may require additional steps for sensitive categories of documents.

Practical example (power of attorney for business in Saudi Arabia):

A Bulgarian company authorises its representative to register a branch and sign contracts in Riyadh. The power of attorney is signed before a notary in Bulgaria, who certifies the signature. In order for the document to “enter” the state system, the notarial signature is then confirmed by the competent central authority (often through the Ministry of Justice or the registries, which verify the specimen signatures and seals). The Ministry of Foreign Affairs subsequently legalises the document, confirming that the previous signatures and seals are authentic and traceable. The document (together with its Arabic translation, if required) is then submitted to the Embassy/Consulate of the Kingdom of Saudi Arabia in Sofia for consular legalisation – this constitutes the second state in the “double” process. Once in Saudi Arabia, the local Ministry of Foreign Affairs (MOFA) will often carry out a final “reception” verification, allowing the power of attorney to be used before the commercial authorities and banks.

In practice, the chain may also include additional steps: certification of the translation (by a sworn translator recognised by the receiving state), confirmation by a Chamber of Commerce for business-related documents, or a requirement that the document be “freshly” issued, valid for only 3–6 months.

This example illustrates how double legalisation (Bulgaria → Saudi Arabia) is carried out through a chain of internal verifications that gradually “elevate” the document from the signature of the issuing authority, to the state seals, and ultimately to the consular legalisation of the receiving country. Careful planning of this chain – identifying which authorities are involved, in what order, within which timeframes and at what cost – is essential to avoid delays and refusals at the final stage of using the document.

Practice of “preliminary consular legalisation”

In international practice, there are cases where ordinary double legalisation is not sufficient and a document must undergo yet another verification. This is known as “preliminary consular legalisation”, which in effect turns the process into a form of triple legalisation. Normally, the procedure begins in the country where the document was issued – it is legalised there by the competent institutions and the Ministry of Foreign Affairs. The document is then presented to the embassy or consulate of the country where it will be used, and receives certification from the diplomatic mission. However, in a number of states this step is not regarded as final. They require that the document, even after passing through their embassy abroad, be submitted once more to the Ministry of Foreign Affairs of the receiving state itself.

This practice is typical of countries in the Middle East and Asia, where maximum control and security are required before accepting foreign documents. For example, even if a Bulgarian diploma has already been legalised by the Ministry of Foreign Affairs and subsequently certified at the Embassy of the United Arab Emirates in Sofia, it must still be submitted for final verification at the UAE Ministry of Foreign Affairs in order to be recognised by universities or employers. A similar procedure applies in Qatar, where documents such as employment contracts or educational certificates are processed through the Qatari Embassy in Sofia, but are only formally recognised once they have been certified by the Ministry of Foreign Affairs in Doha. The same model can be seen in Saudi Arabia, where the certification obtained at the embassy in Bulgaria is merely a preliminary step, and true legal validity is achieved only after confirmation by the Saudi Ministry of Foreign Affairs.

This additional procedure considerably extends the timeframes and often involves extra costs, but at the same time it provides an absolute guarantee that the document will be accepted by the institutions of the receiving country. For individuals and companies planning to study, work or do business in countries such as the UAE, Qatar or Saudi Arabia, preliminary consular legalisation is an unavoidable step and a key requirement for the successful recognition of their documents.

Validity period of legalised documents

Legalised documents are not always “permanent”. In some cases, the certifications have a limited validity period – for example, three or six months – after which a new legalisation must be obtained. This is particularly common with certificates of marital status, powers of attorney or financial documents.

Costs and time – often underestimated

The costs and time involved in double legalisation are frequently underestimated, especially by those encountering the procedure for the first time. At first glance it may appear to be nothing more than a few stamps, but the reality is quite different. In most cases, state fees must be paid to several authorities – first in the country where the document was issued, then at the Ministry of Foreign Affairs, and finally at the consulate of the receiving state. Each of these steps has its own fee schedule, which can vary depending on the type of document – whether it is a diploma, a power of attorney, a commercial contract or a civil status certificate.

In addition to state fees, there are often extra costs for intermediaries. Many individuals and companies rely on specialised agencies or law firms to handle the process on their behalf. While this is a convenient solution that saves time and queues at institutions, it can significantly increase the overall cost. Courier services are sometimes required as well, particularly when documents must be sent abroad for certification. It is not uncommon, for instance, for a document intended for Qatar or Saudi Arabia to be forwarded to a consulate in Vienna or Berlin, since these countries do not maintain diplomatic missions in Sofia.

Time is another factor that is often underestimated. Even with a well-organised procedure, legalisation can take several weeks, and sometimes longer if documents need to travel between different countries. In addition, some institutions operate only on specific days or accept documents in limited time slots, which further extends the process. This can become a serious issue when documents are required at short notice – for example, when applying for a job abroad or participating in a public tender.

Double legalisation is a key mechanism for ensuring the validity of documents in an international context. It is required mainly in countries outside the apostille system and acts as a “double check” of authenticity. Understanding this process saves time, effort and unpleasant surprises – particularly when dealing with important documents related to business, education or personal matters. Ultimately, it is not merely an administrative formality but a necessary safeguard to ensure that a document will be recognised and hold legal value before foreign institutions.