Dear Client,
It is worthwhile to submit a lawsuit against the registered will of your great-grandfather, both for the properties that he declared as self-acquired and for the properties that he declared as ancestral according to the Hindu ancestral properties act. The basis for your appeal will be that your grandfather failed to divide the properties that rightfully belonged to him, and you think the property stated and described as self-acquired is ancestral in nature.
In the case of the ancestral properties, you may claim that the will is unlawful, particularly the distribution of the properties of the deceased, and that your grandfather rightfully deserves a portion of the share in the property.
To prove its status as ancestral property, which you believe it to be in this case, you need to bring evidence to court to show that it was wrongly declared self-acquired property in that will and that the testator had an interest in it. This means that inherited property can be challenged only if the claim is made that the property was not, in fact, ancestral as per the will.
As with most legal disputes, both parties should produce documents and other relevant evidence that the accuser is telling the truth. To have a strong case on your side, hire a lawyer that focuses on the laws governing inheritances and properties. They will help you with the legal procedure and ensure the possibility of a challenge is high.