Challenge registered Will

Prove that will is genuine in civil court .

Thank you Shashi sir, our next date of hearing is on 06.08.2022,our advocate will file a pitition to summon signature expert for cross examination, who has given negative report as such:-size, font, slant, impression, stroke of some letter of the signature in Will is not matching with the sign on earlier GPA".Actually my grand father has executed his will before the SRO, duly witnessed got the document registered by the SRO. Moreover that will paper is duly thumb impressed as well as duly signed. The thumb impression is agreed by claimant(the plaintiff)but two of the signature on will paper mismatching with the agreed signature on Power of attorney is being challenged in the next higher court.my query is whether those two mis matching signature can push the registered will as null and void?accordingly we have to look for any other local advocate or the existing one may continue.. pl sir advise..

The will must be attested by two witnesses ,one witness must be summoned to court to recognise his sign , summon  him to adduce evidence , continue with same advocate.