Births occurring in Texas should be officially registered within the first year. The municipal clerk or secretary is the Local Registrar of births, deaths and fetal deaths in his or her municipality with a population of.An affidavit is a sworn statement of fact that can be used in a variety of legal proceedings, from bankruptcy cases to family and civil litigation matters. Affidavits are normally used in court proceedings or government agencies. General Affidavits are written statements of fact used to support your case or verify facts that are sworn to be true in front of a notary public. Verification letters are available for births that have occurred since 1903. An affidavit of birth is a document submitted to a court, state, or other institution. A person who requests a service pertaining to a record of birth or death, verification of marriage or divorce, or release of personal data.