“Acte authentique”: the notarial deed

In civil law systems an acte authentique is an instrument drawn up by a public officer — typically a notaire — acting within their competence. The officer establishes the identity of the parties, drafts the content, explains its effect, and is answerable for what the document says. The result has a status no private agreement has: what it records is presumed true until formally challenged, and in some systems it can be enforced without first obtaining a judgment.

The contrast that defines it

Its opposite is the acte sous seing privé — an agreement signed by the parties alone. Perfectly valid, but its content proves nothing by itself; if disputed, it must be established like any other evidence. The distinction runs through property sales, marriage contracts, wills and company formation across French-speaking systems.

The gap between the two is where English-language confusion begins. A common-law notary public generally witnesses a signature and certifies identity. A civil law notaire does substantially more, and the difference is set out on French notaire versus Turkish notary.

How Turkish practice maps onto it

Türkiye is a civil law country and its notaries make the same distinction with different names. A deed drawn up by the notary (düzenleme şeklinde) is the authentic instrument: the notary composes the text and is responsible for it. A certification (onaylama şeklinde) is weaker — the notary confirms that a named person signed a document the notary did not draft.

Which form is required is not a matter of preference. Powers of attorney for property transactions, for example, are commonly required in the drawn-up form, and a certified private text is refused at the land registry. Ask the Turkish office that will use the document which form it needs before the notary appointment.

What it does not mean

• Not a guarantee that the facts stated are true. The officer vouches for what happened before them — identity, declarations, date — not for the truth of everything a party asserts.
• Not automatically valid abroad. A Turkish notarial deed still needs an apostille and a translation acceptable to the destination.
• Not what happens to a translation. When a Turkish notary certifies a sworn translator’s signature, the notary is certifying the signature — not endorsing the accuracy of the translation.
• Not the same as legalisation. The two are separate steps, described in apostille versus légalisation.

Why it matters to your file

Whenever an instruction sheet insists that a document be authentique, it is telling you that a certified private text will not do. That single word can be the difference between an appointment at a notary and a file rejected months later.