Declaration of Nullity
This remedy applies to marriages that are void from the beginning. It may involve absence of essential legal requisites, prohibited marriages, bigamous marriages, or Article 36 psychological incapacity.
Article 36 cases require evidence that the incapacity existed at the time of marriage, even if it became clear only later. The Supreme Court in Tan-Andal v. Andal clarified that psychological incapacity is a legal concept, not strictly a medical diagnosis.