The word sounds exotic; the object is mundane and powerful: one standardised certificate that makes your public document usable in 120+ countries. Here is everything worth knowing, without the jargon.
Before 1961, using a document abroad meant a relay of certifications ending at a consulate. The Hague Convention of 5 October 1961 replaced that chain, between member states, with a single certificate: the apostille. It authenticates the signature, the capacity of the signer and the seal — not the content.
A numbered form of ten standard fields, headed «Apostille (Convention de La Haye du 5 octobre 1961)», stapled or printed onto your document, dated, signed and registered by the issuing authority. Any member state must accept it as is.
The state chancellery of the canton that issued the document — Geneva for a Geneva diploma, Zurich for a Zurich extract — and the Federal Chancellery in Bern for federal documents such as criminal-record extracts. Never an embassy, never the destination country.
Whenever a foreign authority of a member state asks for a «legalised», «authenticated» or «apostilled» Swiss document: enrolment abroad, marriage, visa, company registration, inheritance. If the destination is not a member, a consular legalization replaces it — we handle both.