Quick and efficient. When we went for our license, a news reporter asked us to appear on camera, but we were not getting married that day, so they moved on to the next couple. Husband didn't know the name of his biological mother, which is the name still on his birth certificate. After several calls to relatives, we just told the clerk we didn't know the name and asked if it was OK to leave it blank. She said that people leave the father's name blank, so there was not a problem.
What a great help!