A Certificate of No Marriage Record (CENOMAR) from the National Statistics Office (NSO) is simply what its name implies. It is a certification issued by the NSO stating that a person has not contracted any marriage. Also called a certificate of No Record of Marriage or Certificate of Singleness.
In legal definitions for interpersonal status, a single person is someone who has never been married. A person who was previously married and was divorced or widowed is usually considered an “unmarried” person. If a marriage is annulled, however, or it is found to have been void ab initio (i.e. not valid in law to start with), and assuming the person was not married previously, that individual is single, rather than unmarried.