If in a dream you watch from outside how in a registry office there takes place registration of your marriage, then in real life you are not sure of correctness of the decision made by you concerning change of the status. The dream in which you come to a registry office as the witness at someone's wedding, means that in reality you do not risk to begin any new business, will not be absolutely sure of its reliability yet.
Be sure and keep any other thoughts out of your mind before drifting to sleep as a cluttered mind can decrease the chances that you will remember your dreams upon waking. Also, focusing on remembering your dreams upon waking in the morning is another very important thing. This sounds very easy, but is often hard for some to do. Interpret a dream by "dictionary dream of interpretation"
When you very first wake up, simply think about your dreams. Don't allow your mind to drift off to other things, just lay there and think about the things you dreamt about the night before - dictionary dream meaning.