I want to know the procedure of annulment

A case for annulment or a declaration of nullity of marriage is filed at the Regional Trial Court of the place of your friend's residence in the Philippines or that of her husband. The ground usually used as basis for this type of case is Psychological Incapacity under Article 36 of the Philippine Family Code. This is not insanity per se. It means the failure to understand and comply with the essential marital obligations of living together and observing mutual love, respect and fidelity owing to a psychological cause. The manifestations of psychological incapacity may range from sexual abuse or infidelity, physical or psychological abuse, sexual perversion, homosexuality, abandonment, refusal to give support, refusal to cohabit, drug addiction, alcoholism, excessive jealousy and indolence. Your friend's presence in the Philippines shall be required from time to time such as during her deposition-taking at our office and the giving of her testimony in court.