I'm a German immigrant and have visited the U.S. However I'm planning to marry a U.S citizen. If I want to return to Germany will I have any problems returning to the U.S?

The best thing for you to do is to get ahold of the agecny that gave you your ssn#. They should know. But I was always taught that you will always have the same ss#. But call them to make sure. * No. Social Secukrity numbers are permanent once they have been assigned. The exception is a person who is a Survivor of domestic violence; their SSN can be changed for means of protection.