The object of the Apostille is to “abolish the requirement of diplomatic or consular legalization for foreign public documents”. The completed Apostille certifies the authenticity of the signature, the capacity in which the person signing the document has acted and identifies the seal/stamp which the document bears.
The document can be a “Power of Attorney” giving someone the legal right to represent an individual or company. It can also be the documents required to work overseas, such as police background checks, transcripts, and diplomas.