Apply for a new passport due to change of name through marriage or civil partnership
Source: Serviceportal Rheinland-PfalzIf you need your passport and have changed your name due to marriage or registration of a civil partnership, the old passport is invalid. If you are planning to travel, you must apply for a new passport.
You need a passport if you want to travel to a country outside the European Union (EU). The German passport allows you to enter many countries worldwide as a tourist without a visa.