Sir I want to know whether a contract of separation between husband and wife notarized and signed by both the parties sufficient to get marry again?
This cannot be considered as divorce hence if a marriage contracted after this agreement shall be void and not valid.
My husband and I have done such agreement and now he is blackmailing me that we are divorced and that piece of paper is sufficient for him to marry someone else!
He is just threatening you without knowing the legal implications of this. If he marries someone without proper divorce, yo can file a criminal case agaisnt him for the offences of bigamy. If found guilty, he may be put behind bars for 7 years, even his spouse can be punished.
What should I do?
Is that agreement still valid ?
You can file a RCR case against him.
Such agreements are not enforceable in law.