Key Benefits Of An Apostille Certificate When it comes to getting the authentication of any documents or certificates of yours, an apostille service provider can help you. An apostille is a document that confirms the authentication of a document. You can authenticate your birth certificate, marriage certificate, diploma, documents related to business operations, and more. The process may take about 3 to 4 days to complete but it is very beneficial if you need to prove the authenticity of any document in any other country. With that being said, let's take a look at some benefits of an apostille in New Jersey or anywhere else.