A Will is defined as "the legal declaration of the intention of the testator, with respect to his property, which he desires to be carried into effect after his death." In other words, a Will or a Testament means a document made by person whereby he disposes of his property, but such disposal comes into effect only after the death of the testator.
The registration of a document provides evidence that the proper parties had appeared before the registering officers and the latter had attested the same after ascertaining their identity. In India, the registration of Wills is not compulsory even if it relates to immoveable property. The non-registration of a Will does not lead to any inference against the genuineness of a Will. In other words, registration therefore does not give any special sanctity to the Will though registration of the Will by the testator himself evidences the genuineness of the Will.
Approach the civil court and file a suit for declaration . And prove the will with attesting witness.