Dear Gaurav,
Thank you for your query! I am Aadil and I will try to answer your question.
The short answer to your question is NO. You should go for a probate instead.
Assuming that the property in question is self acquired, no person can object to a will made by a person with regard to his self acquired property as section 30 of the Hindu Succession Act, 1956, states that any Hindu can dispose of a property that is under their possession through a will, in accordance with the provisions of the Indian Succession Act.
Therefore it would be invalid to question the terms of a will, but an unregistered will can be questioned for its authenticity and chances of forgery. It must be understood that it is not mandatory in India to register a will, and therefore even an unregistered will is perfectly valid, provided there are witnesses present to attest for the authenticity of the will. If it can be proved in court that the unregistered will is valid, then the terms of the will can no longer be objected to by any one.
Section 2(f) of the Indian Succession Act defines probate as a copy of a will that has been certified by a court of competent jurisdiction through its seal, with a grant of administration of the will of the estate of the testator.
Section 34 of the Specific Relief Act, 1963 describes the purpose of a declaratory suit. In simple words with relation to this case, it can be read as: Any person who is entitled to or has the right towards some property, can file a suit against a person who is denying this right, and the Court in its discretion can make a declaration that this person is so entitled, and the plaintiff is barred from seeking any further relief in such suit.
Hence, a probate suits the purposes of this case more as if the authenticity of the will can be proved in Court, no objections towards the terms of the will can be raised by any of the legal heirs. Filing a declaratory suit would do the same thing as the Court would declare that you have the right towards this property but that would also require the Court to ensure the authenticity of the will first, and it also bars seeking any further relief from this suit. Filing a probate does the same thing, and also ensures that the terms of the will are not objected to.
I hope this helps. Thank you for your time and patience!
Regards,
Aadil