is the 200k annulment fee has to be paid i full?

Atty. Roque here, an annulment lawyer from Roque Law Office. Based on what you shared, being separated for 16 years alone is not yet a ground for annulment under Philippine law. However, getting married at 18 without parental consent may be a possible ground for annulment under Article 45 of the Family Code, provided the case is filed within the legal prescriptive period. We will need to carefully assess the timeline and surrounding circumstances. Your ex-spouse’s prolonged unemployment, by itself, is not automatically a ground, but if there are deeper issues such as psychological incapacity existing at the time of marriage, that may be explored. I recommend that we schedule a consultation so I can properly evaluate your documents and determine the most viable legal remedy—whether annulment or declaration of nullity.