My grand mother 80 year old's ancestral house, being mortagage, without her signature and knowledge, by my uncle to a Non Banking financial company which later become NPA and Now the loan has been assigned to Kotak Mahindra bank, which is a banking company, has issued a section 13 notice under SARFAESI act demanding full payment. What are my grand mother rights and what course of action be taken by her to prevent Bank to under go the auction of her residential house. please help