If you are a German citizen and wish to marry abroad, and the foreign authority requires a certificate of no impediment to marriage, you can apply for a certificate of no impediment to marriage.
If you are a German citizen and wish to marry abroad, the requirements for marriage are determined by German law. 
The certificate of no impediment to marriage confirms that there are no obstacles to the intended marriage under German law.
You can also apply for a German certificate of no impediment to marriage if you are a stateless person, a homeless foreigner, or a foreign refugee within the meaning of the Convention relating to the Status of Refugees with habitual residence in Germany and you need the certificate of no impediment to marriage in order to get married abroad.
This regulation is intended to prevent a marriage from being recognized abroad but not in Germany. It is particularly important for any future children that a marriage concluded abroad is also recognized in the country of origin of the German parent. If you
have multiple nationalities, the law of the country with which you have the closest connection applies. 
A certificate of no impediment to marriage can also be issued if the certificate is required to establish a civil partnership abroad. The registry office in whose jurisdiction the person
getting married has their place of residence or habitual abode is responsible for issuing the certificate of no impediment to marriage. If the person getting married has neither a residence nor a habitual residence in Germany, the place of their last habitual residence is decisive. If the person getting married has never stayed in Germany or has only stayed temporarily, the registry office I in Berlin is responsible.

Application for a court decision pursuant to Section 49 of the Civil Status Act (PStG).

• Period of validity: 6 months
  The certificate of no impediment to marriage is valid for 6 months.

Depends on the individual case.

The amount of the fees varies depending on the fee schedule.

• Card payment (debit, credit, Visa, Mastercard, etc.)
• Mobile payments
• Cash payments are not possible!