llunita, it is an interesting question. You know, in the US it is sort of a taboo topic to ask for a person's marital status or age or a photograph, other things that could be used to discriminate against a person in the hiring process. So we gringos would tend to leave that information out, as suggested by xrayspex. However, in many places it is not an option. I recall that on some other documents where this question is asked, the responses include "Single","Unmarried", or "Not married'.