Sworn Translation, Apostille and Legalization: What’s the Difference?

When a document needs to be used abroad or submitted to a public authority in Italy or another country, additional certification or authentication procedures may be required.

Sworn translations, apostilles and legalization are among the procedures most frequently encountered in international document processes, but they are not interchangeable.

In Italy, a traduzione asseverata—commonly referred to in English as a sworn translation—involves a formal procedure relating to the translation itself.

An apostille and legalization, by contrast, are forms of document authentication. They do not certify the linguistic accuracy of a translation.

Understanding this distinction before starting the process can help avoid unnecessary procedures, additional costs and administrative delays.

The correct approach depends on the type of document, where it was issued, where it will be submitted and the requirements of the receiving authority.

A sworn translation—known in Italian as a traduzione asseverata—involves a formal procedure in which the translator makes a declaration (oath) regarding the accuracy of the translation before the competent authority.

The translation is accompanied by the documentation required for the applicable swearing procedure.

Sworn translations may be required when foreign documents are submitted to Italian public authorities or when Italian documents are being prepared for certain administrative, legal or international procedures.

The important distinction is that the sworn translation procedure relates to the translation itself. It does not perform the same function as an apostille or document legalization.

An apostille is a form of authentication established under the Hague Apostille Convention of 5 October 1961. It does not certify the quality or accuracy of a translation. Its purpose is to authenticate the origin of a public document for use in another country where the Convention applies. Depending on the document and procedure, an apostille may be relevant to documents such as:

Legalization is another form of document authentication used in international procedures.

It may apply when the apostille procedure is not available or when the destination country or receiving authority requires a different authentication process.

Depending on the countries and documents involved, legalization may require several administrative steps and the involvement of competent national authorities or diplomatic and consular representations.

Like an apostille, legalization does not certify the linguistic accuracy of the translation.

The three procedures serve different purposes:

Sworn Translation
Relates to the formal status of the translation under the applicable swearing procedure.

Apostille
Authenticates the origin of a public document for international use under the Hague Apostille Convention.

Legalization
Authenticates a document through the procedure applicable when an apostille is not the appropriate or sufficient route.

In some cases, more than one procedure may be required.

A possible workflow might involve:

Original Document → Translation → Sworn Translation Procedure → Apostille or Legalization

However, this sequence should not be treated as universal. The required steps and their order depend on the document, the countries involved and the requirements of the authority that will receive it. For this reason, the required procedure should ideally be confirmed before translation or authentication begins.

Many delays and unnecessary costs arise because translation, certification and authentication procedures are started before the receiving authority’s requirements have been confirmed. Common mistakes include:

Before proceeding, it is therefore advisable to establish:

• What document needs to be submitted
• Where the document was issued
• Where it will be used
• Which authority will receive it
• What form of translation or certification that authority accepts
• Whether an apostille, legalization or another authentication procedure is required