A Standardized Format Across Countries
One of the defining features of an apostille is that it looks essentially the same no matter which country issues it. This consistency exists because the Hague Apostille Convention of 1961 established a fixed, numbered format that every member country agreed to follow. Rather than each country designing its own certification stamp or letter, the convention specifies exactly what information must appear and in what order, which is precisely what allows an apostille from one member country to be recognized without further verification in any other member country.
This standardized layout is typically presented as a square or rectangular certificate, often titled “Apostille” at the top along with the phrase “Convention de La Haye du 5 octobre 1961” (Hague Convention of 5 October 1961), since French was the convention’s original drafting language. Below that title sits a numbered list of ten fields, and it’s this fixed set of fields that gives the apostille its practical power.
The Ten Required Fields
Every apostille, regardless of the issuing country, contains the same ten numbered pieces of information:
- Country – the country from which the underlying public document originates.
- Signed by – the name of the person who signed the original document (or, for some documents, this may reference the official who certified it).
- Acting in the capacity of – the official title or role of that signer, such as notary public, registrar, or court clerk.
- Bears the seal/stamp of – the name of the authority or office whose seal or stamp appears on the original document.
Following these first four fields, which identify and describe the underlying document and its signer, the certificate moves into the fields that describe the apostille itself:
- Certified – typically the location where the apostille is issued.
- The (date) – the date the apostille was issued.
- By – the name of the authority issuing the apostille itself, which is usually a designated state or national office, such as a Secretary of State’s office in the U.S.
- No. – a unique reference or registration number assigned to that specific apostille.
- Seal/stamp – the official seal or stamp of the issuing authority.
- Signature – the signature of the officer of the issuing authority who authenticated the apostille.
Why the Numbering Matters
The numbered structure isn’t a stylistic choice; it’s what makes apostilles mutually intelligible across languages. A receiving country doesn’t need to read or understand the issuing country’s language to interpret the certificate, because the position and number of each field tells them what information it contains. A government clerk in, for example, Japan can look at field 6 on an apostille issued in Portugal and know it’s a date, even without reading Portuguese, simply because the convention fixes what belongs in that position.
What the Apostille Does Not Verify
It’s worth being clear about the limits of what these fields actually confirm. An apostille certifies the authenticity of the signature, the capacity in which the signer acted, and the identity of the seal or stamp on the document. It does not verify the truthfulness or accuracy of the content inside the underlying document itself. An apostilled diploma confirms that the registrar’s signature and seal are genuine; it says nothing about whether the coursework described on the diploma actually took place. This distinction often surprises people who assume an apostille functions as a broader guarantee of the document’s content.
How It’s Physically Attached
Depending on the issuing country’s practice, the apostille certificate may be attached directly to the original document as a separate page, stapled or otherwise affixed, or in some jurisdictions printed as an allonge that becomes physically inseparable from the document once issued. Some countries have also moved toward electronic apostilles (e-Apostilles), which carry the same ten fields but exist as a verifiable digital record rather than, or in addition to, a physical certificate. Regardless of the format, the substance of what the certificate must contain, the ten numbered fields, remains fixed by the convention itself.
Conclusion
An apostille certificate is intentionally simple and rigidly standardized: ten numbered fields identifying the original signer, their authority, the seal on the document, and the details of the apostille’s own issuance. That rigidity is the entire point, it’s what allows a document authenticated in one member country to be trusted at face value in another, without translation, further verification, or embassy involvement, as long as both countries belong to the convention.