Legal action against imposter for fake thumb impression on a sale deed

If the Thumb Impression of the Developer manifest right Next to his own Genuine Signature on a Registered Deed for Correction of Name of the Purchaser on the Index II of a Sale Deed is later Discovered to be Fraudulent, Then who amongst . The Developer who has Signed next to his own Fake Thumb Impression, . The Power of Attorney Holder of the Developer who has Signed the Document in the Registry Office on Behalf of the Developer, . The Witnesses who have Attested to the Deed of Correction in the Registry Office, . The Purchaser in whose Favour the Document has been Executed, Or . The Impostor who has Faked the Thumb Impression Shall be Considered to be Responsible for the Fake Thumb Impression, & What is the Maximum Penalty which might be Imposed on the Person who is Deemed to be Responsible for the Impersonation?