Struggling to understand apostilles

Posted by OldsterHippie@reddit | expats | View on Reddit | 11 comments

We're in the US, looking at France and Costa Rica (both Hague Convention signatories). Are apostilles required only for federal documents, like passports or an FBI background check? Or for any document, like a county-issued birth certificate? One per copy of a document? It probably varies by country, but any information is appreciated.