The purpose of a notarized marriage certificate is to notarize and prove the legitimacy and authenticity of a couple's relationship. This is a document that needs to be provided in certain specific circumstances, such as immigration, visas, property inheritance, divorce, and social welfare applications. A notarized marriage certificate may be required to prove the existence of a couple's relationship. Through notarization, the marriage certificate is officially recognized and has legal effect, ensuring the rights and interests of both spouses.