Amit’s act of forging his deceased uncle’s signature on a property transfer deed constitutes forgery under Indian law, even if the buyer acted in good faith. Here’s the legal breakdown:

1. Forgery of a Valuable Security
Section 467 IPC:

A property transfer deed qualifies as a "valuable security" under this section.

Forging a deceased person’s signature to transfer property creates a false document with intent to defraud, satisfying actus reus and mens rea .

Punishment: Life imprisonment or imprisonment up to 10 years + fine .

Section 471 IPC:

Using the forged deed to execute the sale (even if the buyer is unaware) attracts liability for fraudulently using a forged document.

Punishment: Same as forgery under Section 467 .

2. Key Legal Principles
Mens Rea Established: Amit’s intent to deceive is evident from forging a deceased person’s signature, which cannot be authorized. Courts presume fraudulent intent in such cases .

Void Transaction: The forged deed is legally invalid. The buyer, though innocent, gains no valid title to the property, which must revert to the rightful heirs .

Judicial Precedent: In cases like Mansukhlal Mer v. Sandeep Dangariya (Result 5), courts have prosecuted similar forgery of property documents post-death, emphasizing strict liability for the forger .

3. Buyer’s Position
The buyer, unaware of the forgery, is not criminally liable but may face civil litigation to reclaim the purchase amount or resolve ownership disputes .

Conclusion
Amit can be prosecuted under Sections 467 and 471 IPC for forging a valuable security and using it fraudulently. The punishment may include life imprisonment or up to 10 years’ imprisonment and a fine. The transaction is void, and the property must be restored to the lawful heirs.