A New Jersey Affidavit of Service is a legal document used in the state of New Jersey to prove that a document was served to a party. It is signed by the individual who delivered the documents to the party and is then notarized by a notary public. There are two types of New Jersey Affidavit of Service: Substitute Service and Personal Service. Substitute Service is when a document is delivered to an adult member of a household other than the recipient. Personal Service is when the document is delivered directly to the recipient. Both types of service require the Affidavit of Service to be signed by the individual delivering the documents and notarized by a notary public.