Is notarized divorce legal

Sir/s, During the year 2002 ; i have been separated from my first husband by way of NOTARIZED DIVORCE both of us thought - at that time - that such DIVORCE are a legal and genuine one. Accordingly myself and my first husband have also married with another women/men. My child is so far living with my first husband. NOW, it is brought to my knowledge that NOTARIZED DIVORCE is not a LEGAL one and due to which my second husband is not willing to continue our relationship. These circumstances, If I would like to go back to my first husband's house, is there any legal way to do so: It is also worth mentioning here that, my first husband has married with a lady who is also taken same type of divorce from her first husband