An apostille is a certificate that authenticates the signature, seal or stamp that appears in the document.
The apostille certificate must contain the following information:
Country of issue
Name of the person who signed the document
The capacity in which the person signed the document.
Details of any seals or stamps in the document
Place of issue
Date of issue
Stamp or seal of the issuing authority
Signature of the representative of the issuing authority
This is what an apostille looks like: